An advertiser is focused primarily on direct response, as opposed to branding. The advertiser should delete keywords from a search campaign if the keywords:

An advertiser is focused primarily on direct response, as opposed to branding. The advertiser should delete keywords from a search campaign if the keywords:

A)  generate many clicks and conversions
B)  generate many impressions and very few conversions
C)  contain more than two words in the phrase
D)  contain words that are duplicated in a display campaign

Answer : generate many impressions and very few conversions

Reason :

Direct response advertisers are normally looking to drive a high volume of conversions at the lowest possible price, and therefore aren't as concerned with marketing their brand. 

Brand advertisers are typically most concerned with ensuring their message reaches their target audience, while maintaining control of where their brand appears, and the cost per impression of their ads.

Read More at https://support.google.com/partners/answer/2740627?hl=en