Sorry I am late on answering the question, if u don’t know what it is still, the answer I believe is D!
Answer:
C. RNA polymerase binding to a region near the gene, called the promoter
<span>there’s another way to retroviruses is to make
more strong screening methods to tell if the transgene is functioning properly
in the embryo before it is implanted in the uterus. The approach leads to fewer
problems with development, but it has raised concerns about the possibility.</span>
