Which of the following statements about paracrine substancesis correct?
A.) Paracrine substances act on nearby tissues without firstentering the blood
B.) Paracrine substances are inactivated quickly; theireffects are short-lived
C.) Interleukin-2 (IL-2) is an example of a paracrinesubstance
D.) A and B are correct
E.) A, B, and C are correct