Question 1: It is a beautiful afternoon and your roommate is considering taking a leisurely stroll through the park. There are several other activities your roommate had to consider doing instead: streaming a movie (value = $5), taking a nap (value = $8), chatting with her best friend (value = $13), reading a new book (value = $15). You observe your roommate take a stroll. What should be your minimum guess estimate of how much your roommate valued the stroll?

A. $15

B. $41

C. $4