At times the balance in nature is , resulting in a number of possibly unforeseen effects.
A. confused
B. puzzled
C. disturbed
D. troubled
网友回答
A. confused
B. puzzled
(答案→)C. disturbed
D. troubled
解析：句意：大自然之间的平衡不时地受到干扰，导致了很多无法预料的后果。A.困惑，迷惑 B. 困惑的，茫然的 C. 扰乱，干扰 D. 麻烦的，不安的。由句意可知选C。