执行下面Python代码后，输出的结果是？（ ）
t1 = ("python", "c++", "scratch")
t2 = tuple(i for i in t1[::-1])
print(t2)
('scratch', 'c++', 'python')
('python', 'scratch', 'c++')
('scratch', 'python','c++')
('c++','python','scratch')