Answer:
A. A young detective researched local art fans and developed a
description of the thief.
Explanation:
I need to know what the context is. Is there an underlined portion that you're supposed to identify as an adjective, adverb, infinitive or preposition? Because (from the museum) is a prepositional phrase.
Answer: Behaviours that are considered to be inappropriate, concerning or threatening include: angry, aggressive communications (verbal or written) ... a noteable change in a student's behaviour that is cause for concern. stalking (repeated attempts to impose unwanted communication or contact)
Explanation: