Which of the following ismost likelyto be deemed an express warranty?

Select one:

a.

Joe Schmoe is selling the family car and tells a potential buyer that the car "runs great".

b.

John Deere's salesperson tells a potential buyer that a tractor "is the best tractor we've ever made".

c.

A coat salesman tells a customer, "I've been to Antarctica, and this is the coat that I trust to keep me warm."

d.

A car salesman tells a prospective buyer that "all of our cars are good for 100,000 miles."