Answer: D is the correct answer choice.
Step-by-step explanation: So you can understand, there will be work for each of the answer choices.
First Answer Choice's Work:
3(1) + 3
3 + 3
6.
Second Answer Choice's Work:
3(2) + 3
6 + 3
9.
Third Answer Choice's Work:
3(3) + 3
9 + 3
12.
Fourth Answer Choice's Work:
3(4) + 3
12 + 3
15.
The correct answer choice is D with the answer of 4.
