Which option correctly fills in the blank?

A. n == 0 B. n == 1 C. n < 0 D. n == 2

Practice 3 — Choose the correct recursive call

We want a function count_down(n) that prints numbers from n down to 1.

def count_down(n):
    if n == 0:
        return
    print(n)
    ______________________

Which line correctly completes the recursion?

A. count_down(n + 1) B. return count_down(n) C. count_down(n - 1) D. print(count_down(n))