Considering verb forms used in the text, its correct to say:
- A. has become (l. 1) describes an action that has no connection with the present time.
- B. to leave (l. 2) is in the imperative form.
- C. passing (l. 8) is in the present continuous.
- D. left (l. 10) describes a past action.
- E. will fall (l. 23) refers to an unreal possibility in the present time.