A red shift means that the object is moving away from you.
Here’s what I found about this

A prophage is a bacteriophage (often shortened to "phage") genome inserted and integrated into the circular bacterial DNA chromosome or exists as an extrachromosomal plasmid. This is a latent form of a phage, in which the viral genes are present in the bacterium without causing disruption of the bacterial cell.
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
The answer to this question is
B: the theory of evolution
I hyope this is correct and helps