The correct answer is C. Featured biking and skateboarding
Explanation:
In grammar most sentences and all simple sentence are composed of mainly two elements, the first one is the subject, which is considered as the agent that carries out the action that is being expressed and the second one is the predicate that is composed by the action or main verb and the complement of it, in this way the predicate completes the idea by telling what the subject is doing and adding extra information about the subject or the action itself. Considering this, in the sentence "The first X Games featured biking and skateboarding" the subject is "The first X Games" as this is the agent of the sentence and as "featured" is the main action or verb and "biking and skateboarding" is the complement of the action or what is featured "featured biking and skateboarding" is the predicate as it contains the verb and the complement of the sentence.
A simple predicate can be a verb or a verb phrase. So the most likely answer to your question would be C, featured biking and skateboarding, since it is a verb phrase.
