Select the word or phrase that makes the following sentence grammatically correct. After ___________ for an entire afternoon, the resident felt revitalized.
Correct Answer: B
Rationale: The correct answer is 'B - resting' because it is the present participle form of the verb 'rest' and fits appropriately in the sentence structure 'After resting for an entire afternoon, the resident felt revitalized.' The present participle is used to show an ongoing action that happened before the feeling of revitalization. Choice A 'having rest' is incorrect as it does not convey the continuous action needed in this context. Choice C 'rested' is incorrect as it is the past tense form and does not match the tense of the sentence. Choice D 'rest' is incorrect as it is the base form of the verb and does not provide the needed -ing form for the sentence.