The correct answer is B. Exasperation.
Exacerbation is the act of making something worse. It is the opposite of alleviation, which is the act of making something better.
Exaggeration is the act of making something seem larger or more important than it really is. It is not the opposite of alleviation, because exaggeration can be used to make something seem better or worse.
Magnification is the act of making something seem larger or more important than it really is. It is not the opposite of alleviation, because magnification can be used to make something seem better or worse.
Intensification is the act of making something stronger or more intense. It is not the opposite of alleviation, because intensification can be used to make something seem better or worse.
In conclusion, the correct answer is B. Exasperation.