Why are people so complicated? why can't people just tell you what they want? my best friend (who is a girl) is mad at me about something and I don't even know what it is that she is mad about. why do girls have to be so complicated? who ever has good answers to my questions will get 35 more points when i make them brainiest.

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles.b) the viral genome codes for specialized enzymes not in the host.c) the virus infects only those cells and species that can perform all the replication roles necessary.d) viruses can stay in a quiescent state until the host cell evolves this ability.