单选题

下列程序运行结果为：a=[2, 4, 6, ...

Question

下列程序运行结果为：

a=[2, 4, 6, 8, 20,30,40]
print(a[::2])
print(a[-2:])

A. [2, 6, 20, 40] [30, 40]

B. [4, 8, 30] [30, 40]

C. [2, 6, 20, 40] [40]

D. [4, 8, 30] [30]