The correct answer is A. Complete predicate
Explanation:
In the English language, most sentences contain two main sections the first one is the subject that refers to the person or entity that is in charge of the action and the second one is the predicate. In general terms, a complete predicate is one that contains a verb and also other words that complete the idea of the sentence and that can act as direct objects, indirect objects or have other functions. This implies in the sentence "The graduation ceremony lasted only two hours" the subject is "The graduation ceremony" and "lasted only two hours" is the complete predicate because this contains the main verb "lasted" and other words that describe the verb and complete the idea of the sentence "only two hours".
