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 simplicity, answers should be in all lower cased letters.

Category: PLAYWRIGHTS 
Clue: In 1979 this author of "Streamers" married Jill Clayburgh
david rabe

Category: DUEL 
Clue: In English-speaking countries, once a duel was accepted, this person chose the weapons to be used
the person being challenged

Category: SLOGANEERING 
Clue: When going out, take this card because "It's Everywhere You Want to Be"

visa