Trader Joe's Recently Filed an Opposition Against a Company Applying

Trader Joe's recently filed an opposition against a company applying to trademark the name "Trader Schmo." Why should Trader Joe's rigorously protect its trademarked name?

A) Trader Joe's risks losing its status as a generic retail grocer.
B) In order to maintain the use of its widely recognizable trademark, Trader Joe's must prevent its name (or too similar a name) from being used by others.
C) The Robinson-Patman Act conferred ownership of the "Trader" name and other trademarked property to Trader Joe's.
D) The government will file charges for trademark infringement only if Trader Joe's, the owner of the trademark, has documented proof of wrongdoing by Trader Schmo.
E) By protecting its trademark, Trader Joe's is protecting the entire retail grocery industry from indirect competition.