Topic: Sequence of Tense,

Best Answer Explained in Below-:

The sentence "As soon as I came in, she - the room." implies an action taken by 'she' in relation to the time frame established by 'I came in.' The phrase indicates that the action of leaving occurred simultaneously or immediately after the speaker's entry into the room.

The correct answer, "C) left," captures this sense of immediacy. It indicates that she completed the action of leaving exactly when the speaker entered, suggesting a direct cause-and-effect relationship.

In contrast:

- A) "was leaving" suggests an action in progress at the moment of entry, which implies she hadn't yet left.
- B) "had left" indicates that her departure occurred before the speaker arrived, which doesn't align with the prompt emphasizing a simultaneous action.
- D) "had been leaving" also implies an action that was taking place continuously before the arrival, which again does not fit with the intended meaning.

Thus, "left" best conveys the action that coincided with the speaker's entry, making it the most appropriate choice in this context.