Given f(A, B, C, D) = ∑ m(0, 1, 2, 6, 8, 9, 10, 11) + ∑ d(3, 7, 14, 15) is a Boolean function, where m represents min-terms and d represents don’t cares. The minimal sum of products expression for f is

Given f(A, B, C, D) = ∑ m(0, 1, 2, 6, 8, 9, 10, 11) + ∑ d(3, 7, 14

1.	Given f(A, B, C, D) = ∑ m(0, 1, 2, 6, 8, 9, 10, 11) + ∑ d(3, 7, 14, 15) is a Boolean function, where m represents min-terms and d represents don’t cares. The minimal sum of products expression for f is
A.	f = AB̅ + CB
B.	f = B̅ + C
C.	f = D̅ + A
D.	f = A̅B + C̅D
Answer» C. f = D̅ + A