In the Proton-Proton Chain, Pictured in the Figure Below, What

In the proton-proton chain, pictured in the figure below, what happens to the emitted gamma rays?

A) They quickly pass through the Sun's outer layers and are emitted into space.
B) They recombine to form electrons.
C) They eventually turn into neutrinos.
D) They are absorbed by other atoms, heating the Sun's core.
E) They are reflected around inside the Sun forever.