By the fact that he stayed in the United States for more than te

By the fact that he stayed in the United States for more than ten years, he developed an American ________.
A、stress
B、sound
C、voice
D、accent
【正确答案】：D
【题目解析】：accent口音。句意：由于他在美国呆了十多年，他养成了美国口音。