Chromosomes is the answer
These fibers provide vis- ceral motor (parasympathetic) innervation to the viscera. The only cranial nerves that transmit parasympathetic fibers are the oculomotor, facial, glossopharyngeal, and vagus nerves.
The answer is A because if you want a reliable source of scientific information you should go to an actual scientist at a scientific conference.
No, sometimes recessive genes come from extended family, Hope it helps!