Assuming that body weight in a particular population is normally distributed with a mean of 82 kg (180 lb) and a standard deviation of 4.5 kg (10 lb), which of the following intervals most closely approximates 95% of the population?

a) 63-100 kg (140-220 lb)

b) 68-95 kg (150-210 lb)

c) 70-93 kg (155-205 lb)

d) 72-90 kg (160-200 lb)

e) 77-86 kg (170-190 lb)