M$2.$A$\mathrm{.}16)$ Why are phosphorus and boron most often used as doping agents in silicon?

Question $30$ options:

The difference in electronegativity between phosphorus$-$doped and boron$-$doped silicon equals the energy of one photon of sunlight

The maximum wavelength of energy that they absorb is $800$ nanometers, close to the peak of the radiation emitted by the Sun

Energy provided by the photons is sufficient to allow these elements to break free from the silicon lattice

They allow for the growth of thin films of silicon on polycrystalline silicon wafers