What Is the Cumulative Probability Distribution of the Following Variable

Multiple Choice

What is the cumulative probability distribution of the following variable?
$\begin{array}{|l|l|}\hline\text { Tires Sold } & \text { Probability } \\\hline 0 & 1 \\\hline 1 & 2 \\\hline 2 & 15 \\\hline 3 & 3 \\\hline 4 & 25 \\\hline\end{array}$

A) 1
B) .5
C) 10
D) .2
E) none of the above