What salesforce functionality is ignored when processing field updates in workflow rules and approval processes? Choose 3 answers

Universal Containers needs the 18-digit record ID from Opportunity records when exporting data to Excel in order to ensure each record is treated uniquely.
What formula should an app builder use to create this new field?

An app builder has been asked to provide users a way to identify a Contact's "Preferred Contact Method" direction on Contact record. Users need to be able to identify whether a phone number or an email, is the Contact's preferred communication method. Which filed type will allow the App Builder to accomplish this with the fewest fields possible?

An app builder at Cloud Kicks created a custom object and related fields in the schema builder.
What next steps should the app build take to ensure users can access the new object and fields7

UVC sells to three different types of organizations. Partner, Enterprise, and Small Business. Some of the information collected about each organization overlaps; however, there are also unique attributes to each type of organization that need to be tracked, some of which are required. What Solution meets these requirements?