49.

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Here we want to express the scenery outside the train.

Item C: Refers to the outside scene from the train, correct.

A item: the train's vision refers to the scene of the train.

B item: train's vision from the window refers to the scene of watching the train from the window.

Item D: Refers to the scene of the train. The expression is wrong, vision does not belong to train, and item A/B is excluded.