下列Python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
