Explanations:The question requires understanding the correct form of the verb "eat" in the context of the past perfect tense. The past perfect tense is formed using the auxiliary verb "had" followed by the past participle of the main verb. In this case, the main verb is "eat," and its past participle form is "eaten."
The sentence "Penelope, Salem, and Jett had eaten all their vegetables" uses the past perfect tense to indicate that the action of eating the vegetables was completed before some other past event. The past perfect tense is used to describe an action that was completed at a specific time in the past, before another action in the past.
It is important to distinguish between the simple past tense and the past perfect tense. The simple past tense is used to describe a completed action in the past, while the past perfect tense is used to describe an action that was completed before another action in the past. For example:
Simple past: "Penelope ate all her vegetables." (This sentence indicates that Penelope completed the action of eating her vegetables at some point in the past.)
Past perfect: "Penelope had eaten all her vegetables before the movie started." (This sentence indicates that Penelope completed the action of eating her vegetables before another past event, which was the movie starting.)
In the given sentence, "Penelope, Salem, and Jett had eaten all their vegetables," the past perfect tense is used to indicate that the action of eating the vegetables was completed before some other past event. The correct form of the verb "eat" in this context is "eaten," which is the past participle form.
It is also important to note that the verb "eat" is an irregular verb, meaning that its past tense and past participle forms do not follow the regular pattern of adding "-ed" to the base form. The simple past tense form of "eat" is "ate," and the past participle form is "eaten." Other examples of irregular verbs include "go" (went, gone), "see" (saw, seen), and "run" (ran, run).
Understanding the correct form of irregular verbs in different tenses is crucial for constructing grammatically correct sentences. In this case, the correct form of the verb "eat" in the past perfect tense is "eaten," making option C the correct answer.