The quotation from paragraph 16, "Marsh was a model pupil as a rule, and had been drawn into the plague's vortex against his will," demonstrates that Marsh is typically respectful but uncomfortable with the dare pranks at the school. The correct answer is option B.
The quotation that shows that Marsh is typically a respectful student who is uncomfortable with the dare pranks is:
B. "Marsh was a model pupil as a rule, and had been drawn into the plague's vortex against his will." (paragraph 16)
This quotation indicates that Marsh is usually a well-behaved and respectful student. The phrase "model pupil" suggests that he is diligent and follows the rules.
However, it also states that Marsh has been "drawn into the plague's vortex against his will," indicating that he is not willingly participating in the dare pranks.
This suggests that Marsh is uncomfortable with the dare pranks and would rather not be involved. The use of the phrase "against his will" implies that he is being pressured or influenced by the craze, further emphasizing his discomfort.