Factors of a4−2a2b2+b4 are:
A. (a+b)2
B. (a2+b2+2ab)
C. (a2+b2−2ab)
D. (a−b)
Factors of a4−2a2b2+b4 are:
A. (a+b)2
B. (a2+b2+2ab)
C. (a2+b2−2ab)
D. (a−b)

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