The coefficients corresponding to k=0,1,2, ...,6 in the expansion of (x + y)^6 are ___.

A. 0, 1, 6, 15, 15, 6, 1, 0

B. 1, 6, 15, 20, 15, 6, 1

C. 0, 6, 15, 20, 15, 6, 0

D. 1, 6, 15, 15, 6, 1