Identify the tense used in the following sentence:
She has eaten her food.

In the sentence "She has eaten her food," the tense used is Present Perfect. The words "has eaten" are formed using the present tense of the auxiliary verb "have" (has) followed by the past participle of the main verb "eat" (eaten). The Present Perfect tense is used to indicate actions that started in the past but have a connection to the present or actions that have just been completed. In this sentence, the action of "eating her food" happened at some unspecified time in the past, but it is related to the present (the food is now eaten), making the correct answer B. The other options do not match the tense used in the given sentence.