However，at times this balance in nature is resulting in a number of possibly unforeseen effects.
A. troubled
B. disturbed
C. confused
D. puzzled
网友回答
A. troubled
(答案→)B. disturbed
C. confused
D. puzzled
解析：词义辨析。A.麻烦； B.打乱； C.使困惑； D.使为难 。句意：然而，有时自然平衡被打乱导致了大量可能无法预料的影响。故选B。