Final answer:
The correct answer is option A. $3.
Step-by-step explanation:
To find out how much Jordan earns per hour, we need to compare his earnings to Gabe's earnings. Given that Jordan earns $3 more per hour than Gabe, we can say that Gabe earns $x per hour and Jordan earns $x + $3 per hour. Since we don't know Gabe's earnings, we cannot determine Jordan's exact earnings. The correct answer is option A. $3.