A potential home buyer asks you, the listing agent, how old the roof is$.$ You were hoping they wouldn't ask about the roof because the seller told you that the roof is $25$ years old. Given the duties specified in the NAR Code of Ethics, what is the most ethical response to the buyer's question?

$($a$)$ Tell the buyer that it looks in good condition.

$($b$)$ Suggest that this is not an important issue and that they should focus on the price instead.

$($c$)$ Tell the buyer that, according to the seller, the roof is $25$ years old.

$($d$)$ Suggest that the buyer contact a roofing company for an inspection.