Due to a Mutation in a Smooth Muscle Gene, the Blood

Due to a mutation in a smooth muscle gene, the blood vessels in the skin of a certain strain of mouse become dilated when temperature falls below a certain point. Based on the likely outcome of this mutation, what precautions should the researchers take to maintain the health of their mice?

A) The mouse room should be maintained at a cooler than normal temperature.
B) The mouse room should be consistently maintained at a warm temperature.
C) The mice will have weak muscles, and should be provided with exercise wheels.
D) The mice will be susceptible to high blood pressure, and should not be provided with exercise wheels.