下列程序段的输出结果是？（ ）
L = []
x = 3
def test(x):
L.append(x)
x = 5
test(x)
print('L = {}, x = {}'.format(L, x))
L = [3], x = 3
L = [5], x = 5
L = [3], x = 5
L = 3, x = 5