Which of the following is the simplest or most basic measure of variability?

In contrast to adolescents, emerging adults are more likely to rank _______________ as the most important reason for engaging in romantic relationships

a. recreation b. intimacy c. status d. companionship

__________ are responsible for coating neural fibers with an insulating fatty sheath

A) Glial cells B) Neurotransmitters C) Brain waves D) Synapses