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若不等式(a-2)x2+2(a-2)x-4<0对x∈R恒成立,则a的取值范围是
[ ]
A.(-∞,2]
B.(-2,2]
C.(-2,2)
D.(-∞,-2)
A.(-∞,2) B.[-2,2] C.(-2,2) D.(-∞,-2)