Let $S = \lbrace a,b,c,f,g\rbrace$

Determine which of the following sets are subsets of $S$ (Check all that apply)
A. $\lbrace a,b,c,f,g\rbrace$
B. $\lbrace a,f,g\rbrace$
C. $\lbrace q,r,s,t\rbrace$
D. $\lbrace a,b,d\rbrace$
E. $\lbrace f,g,h\rbrace$