When added to the word detect, the suffix which means "a person who" is -ive.
"A person who" means that you need to create a noun which refers to a person by adding that suffix. If you add -ive to detect, you will get the noun detective, which is obviously a person.
The word detectary doesn't exist, and the word detection doesn't refer to a person, but rather the act of detecting.
Answer:
A
Explanation:
A is grammatically correct and doesn't use unnecessary punctuation.
The sentence that contains a dangling modifier is C) Looking through the window, the room seemed very large.
It is dangling because we don't know who the participial phrase <em>looking through the window </em>refers to. It certainly doesn't refer to the room, the room wasn't looking through the window.
Erasmus and Luther himself, and they were willing to recognise faults within the Papacy.
Ted wanted Jamie to give him an alibi in court.