Name the process by which new RBCs are produced...explain where this happens...& tell me what other important cells (& important cell fragments) are produced by same process. What are primary functions of these other cells

Take a nutritional supplement during times of stress a. is recommended by al doctors as a stress management technique b. has been scientifically proven to aid in stress management c. only adds to the stress you’re feeling d. can you feel better because you believe it will you