When Light Strikes a Shiny Surface, Much of It Is $\theta$

Multiple Choice

When light strikes a shiny surface, much of it is reflected in the direction shown.However some of it may be scattered on either side of the reflected light.If the intensity (brightness) of the scattered light at the angle $\theta$ (shown in the picture) is I, the Phong model says that $I=k \cos ^{n}(\theta)$ where k and n are positive constants depending on the surface.Thus this function gives an idea of how "spread-out" the scattered light is.What effect does decreasing the parameter n have of the graph of I?

A) The graph drops less quickly
B) The graph stretches upward
C) The graph shrinks downward
D) The graph drops more quickly