To find the commission the salesperson earns for each car sold, we can look at the expression:
\[ 2,000 + 1,000x \]
In this expression:
- \(2,000\) is the base salary.
- \(1,000x\) represents the commission earned for selling \(x\) cars.
The coefficient of \(x\) (which is \(1,000\)) indicates the amount of commission earned for each car sold.
Thus, the correct response is:
B. $1,000