Determine the Sample Space for the Experiment $S = \{ \mathrm { ABC } , \mathrm { ABD } , \mathrm { BCD } \}$

Multiple Choice

Determine the sample space for the experiment.
Three marbles are selected from marbles labeled A through D where the marbles are not replaced and the order of selection does not matter.

A) $S = \{ \mathrm { ABC } , \mathrm { ABD } , \mathrm { BCD } \}$
B) $S = \{ \mathrm { ABC } , \mathrm { ABD } , \mathrm { ACD } , \mathrm { BCD } \}$
C) $S = \{ \mathrm { ABC } , \mathrm { BCD } , \mathrm { CDA } \}$
D) $S = \{ \mathrm { ABC } , \mathrm { ABD } , \mathrm { BCD } , \mathrm { CBA } , \mathrm { CDA } \}$
E) $S = \{ \mathrm { ABC } , \mathrm { ABD } , \mathrm { BCD } , \mathrm { CDB } \}$