Grandma lives with troy's family, but she is forgetful, and troy's mom and dad are worried about leaving grandma alone while they are at work. according to the text, the best alternative for this grandma is a (n) :

The best alternative for this grandma is an "adult day care".

Adult day care is a possibility for senior living that enables elderly grown-ups to be administered to in a daytime office. This kind of senior care furnishes maturing grown-ups with medicinal administrations, intellectual incitement, social association, instructive exercises, suppers, and now and again transportation to and from the office.