Why Would Babies Be Born with a Variety of Reflexes

Why would babies be born with a variety of reflexes?

A) reflexes are primarily used to orient an infant upward,toward sunlight
B) reflexes reflect the most primitive form of learning,so this primes the infant for later learning of more complex information
C) most reflexes confer some survival value to the infant
D) there is no logical reason why reflexes should be present at birth