Each year about percent of americans experience the symptoms of a mental disorder.
a) 10
b) 20
c) 50
d) 60

I agree it's B) 20% because i had a class about it a few days ago.

Adescription of  congestive heart  failure, its symptoms, risk factors, and treatment. to the  heart muscle  other than by artery or blood  flow  problems; signs of  heart  failure may not  meanthe patient has  heart  failure and they quit alcohol, or at least consume alcohol within the national recommended  limits.