The dendrites are covered with synapses formed by the ends of axons from other neurons. ... When neurons receive or send messages, they transmit electrical impulses along their axons, which can range in length from a tiny fraction of an inch (or centimeter) to three feet (about one meter) or more.
I am sure the answer is repel because human hair carries negative charges which mean they will repel because like things repel
ANSWER
D. a star hope this helps :)