Advertisements and Packages for Kellogg's Smart Start Breakfast Cereal Include

Advertisements and packages for Kellogg's Smart Start breakfast cereal include the seal of the American Heart Association, indicating that it is a hearty, healthy choice. This seal can influence consumers to purchase this brand because the American Heart Association has a reputation of trustworthiness and expertise. The seal appearing on packages and in advertisements represents a _____.

A) third-party endorsement
B) testimonial
C) two-sided message
D) sponsorship
E) message frame