At times the balance in nature is ，resulting in a number of possibly unforeseen effects.
A. troubled
B. confused
C. disturbed
D. puzzled
网友回答
A. troubled
B. confused
(答案→)C. disturbed
D. puzzled
解析：考查词义辨析。troubled 麻烦的，confused 困惑的，disturbed 扰乱的，puzzled 迷惑的，句意：有时候大自然的平衡是扰乱的，导致了许多可能未预见的影响。所以选C。