Obviously A, because the others aren't paying attention to the matter at their hands. :)
Answer:
adverb: a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc.
conjunction: a word used to connect clauses or sentences or to coordinate words in the same clause.
hope this helps :)
Chron is the greek root word for 'Time'.
