A buyer took delivery of the deed to his new house but did not record the deed or take possession

a buyer took delivery of the deed to his new house but did not record the deed or take possession of the property. under these circumstances, a) the buyer’s interest is not fully protected against third parties. b) the transfer of the property from the seller is ineffective. c) the deed is invalid after six months. d) the deed is invalid after 90 days.