单选题：以下代码输出结果为？

x = True
y = False
z = False

if not x or y:
print(1)
elif not x or not y and z:
print(2)
elif not x or y or not y and x:
print(3)
else:
print(4)





A.1
B.2
C.3
D.4


答案：C