假定 list1 是 [3, 4, 5, 20, 5, 25, 1, 3], list1.extend([34,5])后list1是什么?

A、[3, 4, 5, 20, 5, 25, 1, 3, 34, 5];

B、 [1, 3, 3, 4, 5, 5, 20, 25, 34, 5];

C、 [25, 20, 5, 5, 4, 3, 3, 1, 34, 5];

D、[3, 1, 25, 5, 20, 5, 4, 3, 34, 5]