Which of the Following Is an Example of an Express

Which of the following is an example of an express warranty?

A) A vendor sells the buyer a fruit that looks and smells good but is found to have worms when cut.
B) A buyer asks a mechanic to provide snow tires and receives tires that are unsafe to use in the snow.
C) A car advertisement that says this vehicle only needs an oil change every 10,000 miles.
D) A buyer buys food for immediate consumption and relies on the food seller's judgment.