What Is the Difference Between a Prophage and a Provirus $\lambda$

What is the difference between a prophage and a provirus, based on what you know about HIV and bacteriophage $\lambda$ ?

A) The host of a prophage is a bacterium, whereas the host of a provirus is a eukaryote.
B) A provirus is in lysogeny, whereas a prophage is the provirus after a return to the lytic phase.
C) A prophage is in lysogeny, whereas a provirus is the prophage after a return to the lytic phase.
D) The host of a prophage is a eukaryote, whereas the host of a provirus is a bacterium.
E) A prophage is regulated by early genes, whereas a provirus is regulated by late genes.