The coefficients corresponding to k = 0, 1, 2, ..., 5 in the expansion of (x + y) 5
are
A. 1, 5, 10, 10, 5, 1
B. 0, 1, 5, 10, 5, 1,0
C. 1, 5, 10, 5, 1
D. 0,5, 10, 10,5, 0