A UV-Vis Radiation Source Has an Intensity of 1

A UV-vis radiation source has an intensity of 1.0 × 10^-3 W.The radiation is sent through an analyte,and the detector measures an intensity of 2.8 × 10^-4 W.What is the absorbance of the sample?

A) 0.28
B) 3.6
C) 0.72
D) 0.55
E) 1.0