Chapter 2.6, Problem 4CP

What is the empirical formula of the compound shown?

$\begin{array}{l}\text{a)}\hfill \\ {\text{c}}_{\text{6}}{\text{h}}_{\text{6}}\hfill \\ \text{b)}\hfill \\ {\text{C}}_{\text{4}}{\text{H}}_{\text{4}}\hfill \\ \text{c)}\hfill \\ {\text{C}}_{\text{2}}{\text{H}}_{\text{2}}\hfill \\ \text{d)}\hfill \\ {\text{CH}}_{\text{2}}\hfill \\ \begin{array}{l}\text{e)}\\ \text{CH}\end{array}\hfill \end{array}$