Final answer:
Reflex B and Reflex C are important for development but not necessary for survival.
Step-by-step explanation:
The reflexes that are important for development but not necessary for survival are Reflex B and Reflex C.
Reflex B is the Moro reflex, which is triggered by a sudden loss of support or a loud noise. It causes the baby to extend their arms and legs and then quickly bring them back to their body.
Reflex C is the grasping reflex, where the baby automatically grasps an object in their hand.