Choice A is the correct choice, The graduation rate in a city and the rate of unemployment in that same city would not have a positive correlation.
The formula for this reaction would be
N + H3 ---> NH3
The first part of the reaction are the reactants and the second part is the product.
The reactants of this reaction are N and H3.
Or you could say the reactants are nitrogen and hydrogen
C. A higher amount of addictive chemicals are needed to get the same high when fewer receptors are present...
