Explanation
The marginal tax rate is the percentage of tax that an individual pays on the last dollar of income earned in a given year. It is also the tax rate that applies to any additional income earned in that year. The marginal tax rate varies depending on the individual's income level and tax bracket. For example, if an individual's taxable income for the year is $50,000 and the tax rate for that income bracket is 20%, then the marginal tax rate is
20%. This means that the individual pays 20% tax on the last dollar of income earned, as well as on any additional income earned above $50,000.
References = Canadian Investment Funds Course, Unit 5: Types of Investments, Lesson 6: Taxation, Section
5.6.1: Income Tax 1; CIFC prepkit, Chapter 5: Types of Investments, Question 5.6.1 2

Explanation
Guaranteed Income Supplement (GIS) and Allowance for the Survivor are both income-tested benefits that are part of the Old Age Security (OAS) program. They are designed to provide financial assistance to low-income seniors who meet certain eligibility criteria. GIS is a monthly payment that supplements the OAS pension for seniors whose income is below a certain threshold. Allowance for the Survivor is a monthly payment for low-income seniors aged 60 to 64 whose spouse or common-law partner has died and who have not remarried or entered into another common-law relationship. The benefit amounts for both GIS and Allowance for the Survivor depend on the income level of the recipient and are adjusted quarterly based on the Consumer Price Index. The higher the income, the lower the benefit amount, until it reaches zero at a certain income limit.
Therefore, eligibility for both GIS and Allowance for the Survivor depends on income level.
References: Canadian Investment Funds Course, Chapter 5: Registered Plans1

Explanation
A is correct because a stock exchange listing would provide Underground with greater market exposure and public confidence than listing on the OTC market. A stock exchange is a regulated and organized market where securities are traded through intermediaries such as brokers. A stock exchange listing can enhance the reputation, visibility, and liquidity of a company's shares, as well as attract more investors and analysts. An OTC market is a decentralized and less regulated market where securities are traded directly between buyers and sellers, usually through dealers or market makers. An OTC listing may have lower costs and fewer requirements than a stock exchange listing, but it also has less transparency, liquidity, and investor protection.
Underground would not be directly involved in the trading of their shares on either market (B), as they would only issue new shares through an IPO and then let the secondary market determine the price and volume of their shares. Underground would be subject to more stringent listing requirements if they chose the stock exchange as compared to the OTC market, as they would have to meet higher standards of financial reporting, disclosure, governance, and compliance. If Underground chose to list on the OTC market, there would still be a secondary market available for investors (D), but it would be less liquid and efficient than a stock exchange. References: Investment Funds in Canada (IFC) | Canadian Securities Institute