Answer: RETROVIRUSES
Explanation:
A Retrovirus, a type of virus from the viral family Retroviridae., is a virus whose genes are encoded in their single stranded RNA which serves as a basis for DNA synthesis  This iRNA then  makes copies of  itself by first coding its genes reversely into the DNA of the cells it infects using an enzyme called reverse transcriptase,
Like other viruses, retroviruses attach through the cell of the organisms they infect to replicate  themselves,but are  different from viruses by reverse transcription and genome integration
There are three Retroviruses that can affect humans which are HIV,Human T-cell lymphotropic virus (HTLV) types 1 and 2 and the flow chart of their  life cycle to illustrate how retroviruses replicate is given below by 
Attachment-Entry-Reverse transcription-Genome integration-Replication --Assembly- Release. 
 
        
             
        
        
        
yes but E. is the most acceptable answer... hoped this helped you have a great day 
 
        
             
        
        
        
Humoral immunity is immunity from serum antibodies produced by plasma cells. More specifically, someone who has never been exposed to a specific disease can gain humoral immunity through administration of antibodies from someone who has been exposed, and survived the same disease.
        
                    
             
        
        
        
Answer:
I think the answer is true
Explanation:
so sorry if it is wrong