Find the Probability for the Experiment of Tossing a Coin

Find the probability for the experiment of tossing a coin four times and getting at least two heads. Use the sample space
$S = \begin{array} { l l l c } \text { HHHH } & H H H T & H H T H & \text { HTHH } \\ \text { THHH } & H H T T & H T H T & T H H T \\ T H T H & H T T H & T T H H & T T T H \\ T T H T & T H T T & H T T T & T T T T \end{array}$

A) $\frac { 11 } { 16 }$
B) $\frac { 1 } { 2 }$
C) $\frac { 13 } { 16 }$
D) $\frac { 7 } { 8 }$
E) $\frac { 5 } { 8 }$