Answer:
Reference librarians are specially trained to help patrons perform:
A. Research a topic
Explanation:
Reference librarians are most often trained to help people find books, organize them, and services surrounding libraries. However, in a corporate environment, they tend to research topics after patrons' guidelines. therefore this is our correct option. Because they don't sign out DVD and even though they are prepared to help someone apply for a library card. That is not their main function. It is a tertiary function. Research in a private corporation is a secondary function because it is primary in a corporative environment.
