The verb that is being used in the given sentence above is "has eaten". The principal part of the verb being used is a past participle. The past participle of the verb is used when the action has been completed some time in the past. This action "has eaten" all of the grapes was done and completed in the past.
The awnser is B. Disgusted. I took the quiz w k12 and it was B. Enjoy
They are called homonyms.
Hope this Helps!!
