Question

What can cause attention deficit hyperactivity disorder (ADHD)? A. low levels of gamma-amino butyric acid B. low levels of serotonin C. low levels of endorphins D. low levels of acetylcholine

Answer 1

(A) Low levels of gamma-amino butyric acid

Step-by-step explanation:

Got it right on the Plato test! #Plato

Answer 2

Answer: B. low levels of serotonin