Which of the Following Is an Example of a Survey

Which of the following is an example of a survey?

A) Tariq reviews business journals for data to support his presentation on home sales.
B) Cleon interviews small-business owners for a presentation on the local economy.
C) Desdemona watches food-truck proprietors compete for customers at a local festival to prepare for a presentation on salesmanship.
D) Wing prepares notes on his personal experiences as software developer for a presentation on the tech industry.
E) Lila searches the Internet for information on how to secure work visas for a presentation on business immigration.