Final answer:
D. Has diarrhea is not one of Piggy's problems.
Step-by-step explanation:
The answer to the question is D. Has diarrhea. Piggy's problems are: A. Has a speech impediment, B. Needs thick glasses, C. Has asthma, and D. Has diarrhea.
However, the question asks for the problem that is NOT one of Piggy's problems, which is diarrhea. Piggy does not have diarrhea as one of his problems.