Concept:The sentence needs a correct passive prepositional phrase showing what material the buildings were made of.Explanation:The subject “Mayan buildings” is plural, so the verb must be plural: “were”.“Made from” correctly means the buildings were constructed using limestone.“Makes” is singular and present tense, so it does not agree with the subject.“Full of” changes the meaning and does not mean “constructed from”.“Makes out of” is also incorrect in tense and agreement.Answer:The correct answer is A: made from.