What statement must be added to the following code snippet to report the number of temperatures below zero?
temperatures = [30, 20, 2, -5, -15, -8, -1, 0, 5, 35]
num_neg = 0
for temp in temperatures:
if
temp _____________

A. num_neg += 1
B. num_neg++
C. num_neg -= 1
D. num_neg % 1