A website that sells high-end ties notices that its ads are showing up for searches that include "cheap". Because its ties are expensive, it does not want its ads to show up for searchers using the word "cheap". What should this advertiser do?

A. change any modified broad match keywords to broad match keywords.

B. add the word "cheap" to its negative keyword list.

C. change exact match keywords to phrase match keywords.

D. use only exact match in its keyword lists.