Aslı has divided her birthday cake into four equal slices as shown below.
Then, she shared one slice of this cake equally among Burcu, Cem, and Deniz.
Accordingly, what is the ratio of the amount that falls to Cem's share to the whole cake?
A) $\frac{1}{4}$\\
B) $\frac{1}{6}$\\
C) $\frac{1}{9}$\\
D) $\frac{1}{12}$\\
E) $\frac{1}{16}$