For the Experiment Described, Write the Indicated Event in Set $\{$

Multiple Choice

For the experiment described, write the indicated event in set notation.
-A coin is tossed three times. Represent the event "the first toss comes up tails" as a subset of the sample space.

A) {tails, heads, heads}
B) $\{$ thh, tht, th $\}$
C) $\{\mathrm{thh}, \mathrm{tht}, \mathrm{th}, \mathrm{ttt}\}$
D) $\{\mathrm{hhh}, \mathrm{hht}, \mathrm{hth}, \mathrm{htt}$ , thh, tht, tth, $\mathrm{ttt}\}$