Answer: Upon reading the Title "Abuelito who?" it makes me wonder, who's Abuelito? and who is the who referring too? Was it saying Abuelito who..... did something? It might be about an Abuelito who felt something or did something, it raises many questions.
Hope this helps :)
You need an objective pronoun here, and the only such pronoun is <em>us. </em>All of the other pronouns are subject pronouns.
The animated movie was more enjoyable to the children that to us. The correct answer is D.
