Refer to the Following:
the Estimated Demand for a Good $\hat { Q } = 4,800 - 16 P - 0.65 M - 1.5 P _ { R }$

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

$\hat { Q } = 4,800 - 16 P - 0.65 M - 1.5 P _ { R }$
where Q is the quantity demanded of the good, P is the price of the good, M is income, and
$P _ { R }$ is the price of related good R.
-The good is

A) an inferior good since the coefficient on $P _ { R }$ is negative.
B) a normal good since the coefficient on $P _ { R }$ 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