For Questions , Use the Following Narrative

Multiple Choice

For Questions , use the following narrative
Narrative: Aspirin and polyps
A study done by the Ohio State University Medical Center examined whether or not taking an aspirin a day would help colon cancer patients reduce the chance of getting subsequent colon polyps.635 patients with colon cancer participated; 317 of them were randomly assigned to the aspirin group, and the other 318 patients were assigned to a placebo (non-aspirin) group.54 patients in the aspirin group developed subsequent polyps, compared to 86 patients in the non-aspirin group.Many confounding variables were controlled for in this well-designed randomized experiment.
-{Aspirin and polyps narrative} For colon cancer patients who take an aspirin a day, what is the expected rate for developing subsequent polyps?

A) Approximately 170 occurrences per 1,000 patients.
B) Approximately 54 occurrences per 635 patients.
C) Approximately 54 occurrences per 140 patients.
D) None of the above.