Final answer:
The probability that deer C is closest to deer A is 1/2.
Step-by-step explanation:
To find the probability that deer C is closest to deer A, we need to consider the positions of the three deer. Let's assume that the field is a straight line and the three deer can be at any position along the line. Since deer B can be anywhere between deer A and deer C, they divide the line into two equal halves. Therefore, the probability that deer C is closest to deer A is 1/2 (option b).