In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 seconds or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 seconds or less.
a. 36.5% < p < 47.5%
b. 33.5% < p < 50.5%
c. 31.0% < p < 53.0%
d. 25.5% < p < 58.5%