response, respond, reply, resolve, resolution, do, result, suffice, solution, question, more...

question, query, inquiry, problem, challenge

yes, no, maybe, I don't know, sure, certainly, definitely, probably, more...

correct, only, right, best, simplest, satisfactory, final, short, affirmative, possible, obvious

in response,   simple solution,   reply quickly,   greet at the phone,   a solution,   to respond to,   to reply to,   to respond,   possible solution,   to retort