Refer to the Following

refer to the following:
The estimated demand for a good is

where Q is the quantity demanded of the good, P is the price of the good, M is income, and is the price of related good R.
-The good is

A) an inferior good since the coefficient on

Is positive.
B) a normal good since the coefficient on

Is positive.
C) an inferior good since the coefficient on M is greater than one.
D) a normal good since the coefficient on M is positive.
E) none of the above