Let a + b + c is even and we want to a * b * c is a multiple of 4 or not!If the sum of three integers is even, is the product of the three integers a multiple of 4 ?
(1) All three integers are equal.
(2) All three integers are even.
Now if we take 1, a = b = c and again it has to be that a + b + c is even so that means a, b and c have to be even. So each of a, b and c is multiple of 2. So a * b * c should be multiple of 4.
According to 2, it is clearly saying that a, b and c are even so we can easily incorporate the above logic here.
So D.
