Answer:
C-Attaching to a host
Step-by-step explanation:
It wouldn’t be entering the cell because I’ve learned that it needs to attach to a host first, and it wouldn’t be replicating because it needs to be in the host before it starts. Which leaves assembling and attaching. It is attaching and not assembling because assembling is one of the last ones, second to last step, so the answer would be attaching.