There are many different views on the causes of drug use. the subcultural view of substance abuse concentrates on addiction.

The Correct Answer is "Lower class".

Explanation:

Causes of Drug Use are such as:

Many Times Drug abuse starts with informal use.Drugs can make you feel good for a bit and make you feel superhuman or cool from the rest of the people.They may make you feel energetic, powerful and self-confident.If you keep do drugs, you would evolve a strong craving for the drug and it may get harder to say No to further use.These can be looked like a great cause of Drug uses.

The answer is    (d) 7/2======we have    we also  have an integral      notice how function f splits up at x = 0. there's a left piece and a right pieceso we'll need to do the same thing with our integral: split it at x = 0we use a property of integrals that allows us to split up and sum:     notice that for the piecewise function f, the function has the equationf(x) = x when x  ≤ 0. so for the integral  , f(x) = x so it changes into      for the piecewise function f, the function has the equationf(x) = x+1  when x  > 0. for the integral  , we have    therefore, back to our splitted integral: