I believe the answer to your question is oligodendrocytes.
What exactly do you need help with?
I would say B, as both A and D are obviously incorrect and stress can be a natural part of life as long as it does not dominate you.
Light skin jshsjdkdkdddkkdkdndnnd
Epithelial cells is the type of tissue that is designed to regulate temperature, secrete lubricants, and protect the body from harmful substances. Hope this helped! :)