The Magnuson-Moss Act

a. requires that all warranties be "full."
b. says that all firms must offer written warranties for all products.
c. requires that all warranties cover at least a one-year period.
d. says that producers must provide a clearly written warranty if they choose to offer any warranty.
e. All these answers are correct.

d. says that producers must provide a clearly written warranty if they choose to offer any warranty.

Explanation:

The Magnuson-Moss Warranty Act was passed by the United States Congress in 1975. the Magnuson moss Warranty act is the federal law that protects consumer product warranties . The Act stipulates that if a manufacturer or seller of consumer products wishes to offers warranty on those products then he must provide consumers with clear and detailed information about warranty coverage

b) to encourage free trade