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 negative.
B) a normal good since the coefficient on

Is negative.
C) a normal good since the coefficient on M is greater than one (in absolute value) .
D) an inferior good since the coefficient on M is negative.
E) none of the above