For a light that has an intensity of 60 candies at its source, the intensity in candles, S, of the light at a point d feet from the source is given by the formula , where k is a constant. If the intensity of the light is 30 candles at a distance of 2 feet from the Source, What is the intensity of the light at a distance of 20 feet from the source ?()
A.A
B.B
C.C
D.D
E.E