Is this question regarding insulation in a house correct?

[Dreebs]

Homework Statement

2. The attic of your house will be vented to the outside and neither heated nor cooled. It will become relatively hot in summer and cold in winter. You will therefore need to put thick insulation in the attic floor to reduce heat flow between the air below that floor and air above that floor. That attic insulation will be especially important during Select one:
a. the summer, when hot air will accumulate near the ceiling just below the attic and cold air will accumulate just above the attic floor.
b. the winter, when cold air will accumulate near the ceiling just below the attic and hot air will accumulate just above the attic floor.
c. the summer, when cold air will accumulate near the ceiling just below the attic and hot air will accumulate just above the attic floor.
d. the winter, when hot air will accumulate near the ceiling just below the attic and cold air will accumulate just above the attic floor. D, because warm air rises, so insulation in the ceiling would be most important in keeping out sinking cold air.

 

[Merlin3189]

I agree with your answer and your reason, adding only that for a) I would be grateful for poor insulation if that situation occurred in summer