A good reason for Canadians to have central heating systems is

Select one:
a. to stop water pipes from freezing in winter.
b. to use large amounts of energy in winter.
c. to help passive solar heating.
d. to cool houses in summer.

3 answers

I am not sure what answer is correct. Please help me.
a) and d) are both correct : )
PS... I live in CANADA
Thank you so much Ms Pi! I don't think d is correct because why would we want to spend lots of energy? We want to use less, right?