According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal $V_s$ the frequency, of the incident radiation gives straight line whose slope

Question

( A ) depends on the nature of the metal used
( B ) depends on the intensity of the radiation
( C ) depends both on the intensity of the radiation and the metal used
( D ) is the same for all metals and independent of the intensity of the radiation