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函数y=的单调递增区间是
A.(-∞,-2) B.[-5,-2] C.(-2,+∞) D.[-2,1]
(-∞,1]
[0,1]
[1,+∞)
[1,2]
A.[1,3]
B.[2,3]
C.[1,2]
D.[-∞,2]