More Than 40 Studies of HGH in Healthy Athletes, Conducted

More than 40 studies of hGH in healthy athletes, conducted between 1966 to 2007, reveal that hGH __________.

A) increases lean body mass but does not raise levels of strength or endurance
B) increases lean body mass and raises levels of strength or endurance
C) raises level of strength and endurance but does not increase lean body mass
D) does not increase lean body mass or levels of strength or endurance