Final answer:
Sam has 3 shirts, 3 pairs of shorts, and 2 pairs of shoes. The number of possible combinations is 18.
Step-by-step explanation:
To find the number of possible combinations, we multiply the number of choices for each category. Sam has 3 shirts, 3 pairs of shorts, and 2 pairs of shoes. To find the number of combinations, we multiply these numbers together: 3 shirts x 3 pairs of shorts x 2 pairs of shoes = 18 combinations. Therefore, the correct answer is B. 18 combinations.