Mrs. Dorling, a character in the story, has been described as a rather unpleasant and snobbish woman who is not very liked by the author. The author has provided several instances throughout the story that highlight Mrs. Dorling's negative qualities.

The author's decision to leave Mrs. Dorling in a hurry can be attributed to two main reasons:

a) Getting late for the train:
One possible reason for the author leaving in a hurry is because she was running late for her train. The story mentions that the author had to catch a train, and it was already getting late. This implies that the author had a time constraint and could not afford to stay any longer.

b) No longer wanting to stay there:
Another reason for the author leaving in a hurry could be that she no longer wanted to stay in Mrs. Dorling's company. As mentioned earlier, Mrs. Dorling's character is portrayed negatively, and the author may have reached a point where she could not tolerate her any longer. The author may have found Mrs. Dorling's behavior and attitude unbearable, and thus decided to leave abruptly.

c) Both (A) and (B):
The correct answer to the question is option 'C', which states that the author left Mrs. Dorling in a hurry because she was getting late for the train and because she no longer wanted to stay there. Both reasons seem to be valid based on the information provided in the story.

In conclusion, the author left Mrs. Dorling in a hurry due to a combination of factors. She was running late for her train and also no longer wanted to stay in Mrs. Dorling's company. Both reasons contributed to the author's decision to leave abruptly.