In 1935, the U

In 1935, the U.S.Patent and Trademark Office issued Parker Brothers a trademark on the use of the name Monopoly for a board game.Hasbro bought Parker Brothers in 1991.Which of the following statements is true regarding the trademark on the name Monopoly for a board game?

A) The original trademark expired well before Hasbro bought Parker Brothers, so they never had a trademark on Monopoly.
B) Trademarks never expire, so Hasbro continues to have a trademark on the name Monopoly.
C) The trademark expired in 2011, 20 years after Hasbro's purchase of Parker Brothers.
D) The trademark expired in 1955, 20 years after the trademark was issued to Parker Brothers.