C is the answer to this question...
The answer is D.
(A.) doesn’t make sense because this is a flashback to when the author was four, which means they are older and able to comprehend and remember the past.
(B.) doesn’t make sense because they are no longer four so they have already lived to know what it’s like without a grandfather.
(C.) doesn’t make sense because we can’t infer from the text that he was relieved the grandfather is gone.
use it as a chance to improve and work even harder
