TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
PROBLEM: Category: THE 1980s 
Clue: In 1985 the PMRC wanted these labeled for "Parental Guidance" if they contained explicit lyrics

SOLUTION: records

PROBLEM: Category: BODY LANGUAGE 
Clue: When vou're idle or just plain bored, you do this with your pollex digits, literally or figuratively

SOLUTION: twiddle your thumbs

PROBLEM: Category: CIVIL WAR GENERALS 
Clue: Driving the Confederates off Missionary Ridge near Chattanooga in Nov. 1863 made him a national hero

SOLUTION:
ulysses s. grant