Eppie's Used Cars Wanted to Determine Whether Straight Price Discounting

Eppie's Used Cars wanted to determine whether straight price discounting worked better than a free gift.It ran two different television commercials on alternate Wednesdays.Commercial A offered 20 percent off Blue Book price for any 4-wheel-drive vehicle on the lot while Commercial B offered a free tent with the purchase of any 4-wheel-drive vehicle at Blue Book price.The offer was the __________ variable.How many people responded to each type of offer was the __________,and would suggest whether straight discounting or a gift incentive was the better strategy for increasing traffic.

A) marketing; dependent variable
B) dependent ; independent variable
C) control data; independent variable
D) independent; dependent variable
E) dependent; control data