The Answer that makes the most sense is C.
The heat (energy) needed to raise the temperature of the water is given by

The wavelength of the radiation of the oven is

, so the energy of a single photon of this radiation is

So, the number of photons required to heat the water is the total energy absorbed by the water divided by the energy of a single photon:

photons
Answer: "important and helpful" Show garret is paying close attention to her coach. Hope this help!
I believe C is your answer (also, I am also using tht same exact program!)