List all the subsets of the given set.
{h, k, w}
Choose the answer that lists all of the subsets of {h, k, w}.
A. {h}, {k}, {w}, {h, k}, {h, w}, {k, w}, {h, k, w}
B. {}, {h}, {k}, {w}, {h, k}, {h, w}, {k, w}, {h, k, w}
C. {h}, {k}, {w}, {h, k}, {h, w}, {k, w}
D. {}, {h}, {k}, {w}, {h, k}, {h, w}, {k, w}