The professional football star andro "the man" mcgraw claims the dietary supplement aminoprofix him build muscle mass quickly and safely. his endorsement of the product is an example of
a) peer review
b) a scientifically valid claim
c) unbiased reporting
d) a testimonial
e) in vivo

d) a testimonial

Explanation:

A testimonial is a statement or description which examines and claims something on the basis of the features of some entity or article and testifies it either beneficial or non-beneficial.

The endorsement of the product in the given situation can be an example of testimonial. As in this McGraw claims for the support of the dietary supplement which has helped him in building the muscle mass.

when i got mine it was about a 6 or 7