Which of the Following Statements About Inquiry Tests Is True

Which of the following statements about inquiry tests is true?

A) With inquiry test, additional product information, product samples, or premiums are offered to an ad's readers or viewers, and ads generating the most inquiries are presumed to be the most effective.
B) With inquiry tests, a question such as, "What ads do you remember seeing yesterday?" is asked of respondents without any other prompting to determine whether they saw or heard advertising messages.
C) Inquiry tests involve studies such as controlled experiments and consumer purchase tests.
D) In an inquiry test, respondents are asked questions to measure changes in their attitudes after an advertising campaign, such as whether they had a more favourable attitude toward the product advertise