Multiple Choice
Which two specific changes occur in the immune system beginning in adolescence?
A) Decrease in red blood cell production and white cell production
B) Shrinking of the thyroid gland and decrease in thyroxine
C) Shrinking of the thymus gland and production of immature T cells
D) Gradual loss of gray matter and an increase in white blood cells
Correct Answer:

Verified
Correct Answer:
Verified
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