单选题 After witnessing a number of territorial skirmishes, Dr. Jarmen had to change his earlier opinion that these particular breeds of chipmunk were always ______ animals.
A. curious B. harsh C. quarreling D. peaceful

【正确答案】 D

【答案解析】peaceful爱好和平的；安详的。curious好奇的。harsh严厉的；粗糙的。quarreling争吵，意见不一致。