Use the Following Dataset to Answer the Following Question - What Is the Unit of Observation?
A) Month-Tenure
B)

Use the following dataset to answer the following question. $$\begin{array} { | l | c | c | c | r | } \hline { \text { Name } } & \text { Month } & \text { Cormnissimm } & \text { Tenure } & \text { Travel Expense } \\\hline \text { Sophie Castro } & 1 & \$ 48,000 & 4 \text { years } & \$ 11,000 \\\hline \text { Travis Turner } & 1 & \$ 53,000 & \text { 7 years } & \$ 21,000 \\\hline \text { Elias Harsent } & 2 & \$ 67,000 & 10 \text { years } & \$ 7,000 \\\hline \text { Armanda Garza } & 2 & \$ 72,000 & 8 \text { years } & \$ 14,000 \\\hline\end{array}$$
- What is the unit of observation?

A) Month-tenure
B) Person-month
C) Month
D) Tenure