问题详情

Millions of dollars often depend on the choice of which commercial to use in launching a new product. So you show the commercials to a (1)_____ of typical consumers and ask their opinion. The answers you get can sometimes lead you into a big (2)_____. Respondents may lie just to be polite.
Now some companies and major advertising (3)_____ have been hiring voice detectives who test your normal voice and then record you on tape (4)_____ commenting on a product. A computer analyzes the degree and direction of change (5)_____ normal. One kind of divergence of pitch means the subject (6)_____ Another kind means he was really enthusiastic. In a testing of two commercials (7)_____ children, they were, vocally, about equally (8)_____ of both, but the computer reported their emotional (9)_____ in the two was totally different.
Most major commercials are sent for resting-to theaters (10)_____ with various electronic measuring devices. People regarded as (11)_____ are brought in off the street. Viewers can push buttons to (12)_____ whether they are interested or bored.
Newspaper and magazine groups became intensely interested in testing their ads for a product (13)_____ TV ads for the same product. They were interested because the main (14)_____ of evidence shows that people (15)_____ a lot more mental activity when they read (16)_____ when they sit in front of the TV set. TV began to be (17)_____ "a low-involvement" (18)_____. It is contended that low involvement means that there is less (19)_____ that the ad message will be (20)_____.
Notes: commercial广告。pitch音调
A．pack
B．flock
C．multiple
D．bulk请帮忙给出正确答案和分析，谢谢！