The statement that best describes how the perspective of the parents changes from the beginning to the end of the story is:
Expressing hatred and disgust at the grandfather to showing him love and kindness.
At the beginning of the story, the parents are irritated and embarrassed by the old man's inability to eat properly and treat him with disdain, making him eat separately. By the end of the story, after witnessing their young son's innocent actions and intentions, their perspective shifts, leading them to express compassion and include the grandfather at the table, treating him with kindness.