Some Physiological and Morphological Adaptations Appear to Have Evolved Independently

Multiple Choice

Some physiological and morphological adaptations appear to have evolved independently many times, while others appear to have evolved only once. Which of the following is an example of this?

A) Air breathing in humans has arisen independently multiple times, while an amniotic egg has evolved just once.
B) Air breathing in amphibians has arisen independently multiple times, while an amniotic egg has evolved just once.
C) Air breathing in fishes has arisen independently multiple times, while an amniotic egg has evolved just once.
D) Air breathing in birds has arisen just once, while an amniotic egg has evolved multiple times.