A developer is configuring Payment Methods on a storefront. Which of the following considerations should be kept in rmnd while configuring payment methods,

A developer is working on a new site for the U.S based on an existing Canadian site. One of the requirements is a change to the address form. The current Canadian form has an <options> list with the correct two-letter abbreviation for the provinces.
The U.S. requirements are to:
* Have an <options> list with the correct two-letter abbreviation for the states in place of the province field.
* Set the U.S site locale.
* Add the options list field definition to the XML file.
How should the developer set up the files before making the required edits?

A developer is implementing new Page Designer content on a merchant's Storefront and adds the line shown below to the setupCsntentSearch function in the searchHelpers.Js file.
What does this achieve?

The developer created a new Storefront category in storefront-catalog-m-en, but when viewing the Storefront site, the category is not visible.
What are two possible reasons?

The developer is asked to enhance the functionality of an existing controller route by adding information to the response's viewData.
How should the developer approach this task while following SFRA best practices?