运行下列程序，输出结果是？（ ）
tuple1 = (4, 3, 2, 1)
tuple2 = (2)
print(tuple1 * tuple2)
(4, 3, 2, 1)
(8, 6, 4, 2)
(4, 3, 2, 1, 4, 3, 2, 1)
上述代码执行报错