Assertion: Many adaptations have evolved ever a long evolutionary time and are genetically fixed.
Reason: Some organisms coping with extremes in the environment able to respond through certain physiological and behavioural adjustments.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.