The correct answer to this question is C. Turn the fan on continually. During the wintertime, it is difficult to keep a house warm. It is especially difficult for a larger home and for those whose homes are in the North, where there are colder temperatures.
Yet, keeping the fan on came to keep the heat constantly rotating and keeping the rooms warm. This will allow the owner of a home to have the ability to use their attic or basement without being severely cold. Another option is to keep the heat on all the time, but this increase the heating bill.
Turn the fan on continually.-by keeping the fan on all the time, the heat in your home is rotated and colder spots will be come warmer and comfortable. imagine being able to use your basement in the winter again. this holds true in the summer time too by taking the coolness out of the basement and circulating it throughout the house (and also getting rid of the damp smell in the basement too). the only thing to be concerned about is that most furnaces do not have a variable speed fan and can cost you well over $200 to run a year. (newer esc fan motors area variable speed and can cost as low as $20 to run for the entire year)