Answer:
A.messages that are sent from the brain to body parts
Answer: If he's your friend then you should know who they truly are, and how to truly respond. So simply say, "You're not ready to go" Or "You're just not feeling it." Also depending on your reasoning for not wanting to go, I can't truly explain. But if you don't want to go, just because you don't want to go, It's easy as "Maybe next time" Or "Not today."
Explanation:
from the little information given, this statement is true
Beginning signs would be memory loss, inability to do challenges, difficulty completing tasks, confusion with time, misplacing things, poor judgment, etc