Answer
B is a subset of A and C is a subset of both A and D.
Work Step by Step
We want to see whether A, B, C, and D are subsets of one another.
A is not a subset of the other three, because B lacks the element 4 and both C and D lack 2.
B is a subset of A, but not of the other two sets. C and D both lack 2.
C is a subset of A and D. B lacks 4.
D is not a subset of the other sets, because none of them have the element 8.
