Light Intensity (I) Can Be Described as the Power Emitted $\pi$

Multiple Choice

Light intensity (I) can be described as the power emitted by a light source (P) over a given area in meters squared) .Suppose a 100 W mercury vapor lamp emits 365.4 nm photons equally in all directions.At a distance of 1.450 m, how many photons hit per square meter per second?
(1 W = 1 J/s; I = P/Area = P/4 $\pi$ d ² , where d is the distance.)

A) 5 * 10⁷ photons
B) 7 * 10⁹ photons
C) 9 * 10¹⁶ photons
D) 7 * 10¹⁸ photons
E) 6 * 10¹⁹ photons