How Many Possible IRRs Could You Find for the Following

Multiple Choice

How many possible IRRs could you find for the following set of cash flows?
$$\begin{array} { c c c c c c } \text { Time } & 0 & 1 & 2 & 3 & 4 \\\text { Cash Flow } & - \$ 15,000 & \$ 6,000 & \$ 10,000 & \$ 12,000 & \$ 1,000\end{array}$$

A) 1
B) 2
C) 3
D) Unable to determine unless we have the cost of capital.