If you help me , thank you ur literally a amazing person What types of cells may not undergo mitosis at all?

A. hair

B. brain

C. skin

D. cheek

Why may some young adults go through a quarter-life crisis? a. they are entering middle age and feel distressed about growing old. b. they feel insecure about themselves and their future. c. they have been promoted to more secure, better-paying jobs. d. they have developed more stable personal relationships.