I believe the answer would be
B. diverse people contribute to the country's identity
Answer: Humor great stress reliever because it releases cortisol and epinephrine along with endorphins which make you happy and can reduce physical pain.Laughing strengthening our immune system by releasing antibody- producing cells which protects your body.Laughing is the reaction of the motor region of your brain becoming active.
Explanation:
These. it is demonstrating what the speaker is taking about
