eBay partnered with Nielsen Co. to poll users about ads on eBay. Nielsen then packaged the information for advertisers. This was a response to advertiser complaints about the effectiveness of ads on the Internet. Verifying ad effectiveness of other companies before buying ad space on eBay is a ____ control for the businesses.

a. screening
b. preliminary
c. concurrent
d. postaction
e. feedback

ANSWER:

prelimminary