单项选择题

Chatwin has devoted his life to a kind of Grail quest, hoping to prove—by study and direct experience with primitive people—that human nature is gentle and defensive rather than ______ , and that man is ______, not a predator.

(A) belligerent...an apostate
(B) martial...a crusader
(C) aggressive...a pilgrim
(D) truculent...a gladiator
(E) pugnacious...a pawn