Well.. you have to show us the story first so we can answer..
The highlighted part of the sentence is called a/an Professor Plum , who had been to the mansion before , expertly navigated the maze of rooms andcorridors to quickly reach the conservatory
I think this is what you are wanting to know. You would use a not an If the word/name (Professor Plum) would have been something starting with a vowel instead, you would use an
Is this what you were asking?
The sentence is in past tense. This is noted by the ending -ed in the word healed.
The answer is:
D.personal responsibility
Event is a word that means anything that happens to or is done by a character in a story.
