To find out how much the salesperson earns for the month if he doesn't sell any cars, we need to substitute \( x = 0 \) into the expression \( 2,000 + 1,000x \).
So, when \( x = 0 \):
\[ 2,000 + 1,000(0) = 2,000 + 0 = 2,000 \]
Therefore, if the salesman doesn't sell a car, he earns $2,000 for the month.
The correct response is: C. $2,000