Bill bought a Black & Decker toaster oven at Best Buy. The toaster oven comes with a one-year written guarantee. Bill wants to be sure that all features of the toaster oven function properly. Black & Decker includes a statement on its products that says "complete satisfaction guaranteed" (a statement of performance) and also documents written in technical language that explain in depth the various functions of the toaster oven and how to care for it. This is an example

a.

express warranty

b.

implied warranty

c.

oral warranty

d.

committed warranty