More than half of all teenagers have tried an illicit drug by the time they finish high school what is commonly used drug among teenagers?
a)marijuana
b)cocaine
c)heroin
d)lsd

yall KNOW its marijuana UR IN HIGHSCHOOL DONT TRY ME

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.