Which one refers to Allen's rule ?

Options

A. If stressful conditions are localised or remain only for a short duration an organism either migrates or suspends itself
B. Mammals from colder climates have shorter ears and limbs to minimise heat loss
C. An organism can move form a stressful habitat to a more hospitable area and return when the stressful period is over
D. Low atmospheric pressure in higher altitudes results in altitude sickness

Answer

B