According to Newton's law of cooling, the rate at which an object cools is directly proportional to the temperature difference between the object and the surrounding medium. If a certain object cools from 120°F to 95°F in half an hour while surrounded by air at 72°F, what will be its temperature at the end of another half hour?
A) 85°F
B) 89°F
C) 91°F
D) 93°F
