Advertisers can protect themselves against overexposure:. a) by hiring more than one celebrity for endorsing a particular brand. b) with an exclusivity clause limiting the number of products a celebrity can endorse. c) by attempting to match the characteristics of the target market with the personality of a celebrity. d) by creating celebrity advertisements that generate counterarguments. e) by hiring common consumers instead of celebrities to feature in their commercials.

B. with an exclusivity clause limiting the number of products a celebrity can endorse.

Explanation:

An exclusivity clause is a legal document that allows a celebrity to work exclusively with the issuer of contract and restricts them from participating in any marketing activity of any individual or any company without getting into the contract with them. The exclusivity clause is also helpful in creating a competitive advantage by limiting with whom your business partner should work. Advertiser can use exclusivity clause to protect themselves against overexposure.