单选题：以下哪句打印出smith\exam1\test.txt？

以下哪句打印出smith\exam1\test.txt？



A.print("smith\exam1\test.txt")
B.print("smith\\\exam1\\\test.txt")
C.print("smith\"exam1\"test.txt")
D.print("smith"\exam1"\test.txt")


答案：B