A Strain of HIV Has More Termination of Partial Transcripts

A strain of HIV has more termination of partial transcripts than is typical.The most likely cause is a mutation

A) that causes tat protein to be somewhat more able to bind to RNA.
B) that causes tat protein to be somewhat less able to bind to RNA.
C) that causes reverse transcriptase to be more active.
D) that causes reverse transcriptase to be less active.
E) in a protease that increases its activity.