From a _____ perspective, factitious behaviors are maintained because other people positively reinforce the person's illness mannerisms.

According to national U.S. studies, in 1978 nearly ____ of children ages 5–10 had dangerously elevated levels of lead in their blood, which can cause brain damage; by 2001, the rate had fallen to ____

a. 30%; 1% b. 40%; 5% c. 50%; 10% d. 60%; 15%

THC administered orally

a. exerts effects subjectively similar to those that occur via smoking b. is often more potent than smoked THC c. results in metabolites that are presently not detectable by urinalysis d. is not absorbed from the gastrointestinal tract