Felix launched both a google search ad campaign and a google display ad campaign to drive sales of tools on his home improvement website. he reviewed his sales data after two weeks and noticed his search ad campaign is the most successful. which optimization type should felix use if he wants to use bidding or targeting to acquire more customers? a. media mix
b. channel
c. attribution
d. placements

B. Channel

Explanation:

Channel optimization is the process whereby a client comes to you (as opposed to media outbound interactions). Channel optimization provides the opportunity through which consumers, whether physically or virtually, can make an active decision to visit your business.

Whether they're visiting your website, like Felix or they are calling the Service Center.  

Merkle perspectives a channel as a means through which consumers can actively choose, participate, and manage their own visits and interactions with a business.

i think it could be virus