Here's a problem to solve: Sean felt the room become cooler. His body adjusts to enable him to survive. Which response did Sean have that enabled his body to continue to function correctly?

Among the 4 following options, which is the correct answer?

- A: an increase in cellular respiration which increases heat production
 
- B: sweating from the skin to lower inner heat levels
 
- C: opening of the capillaries in the skin to obtain more heat
 
- D: an increase in the metabolism which decreases heat from cells
 