What Happens During the Elongation Step of Transcription

What happens during the elongation step of transcription?

A) An RNA transcript is formed and stays bound to the DNA template.
B) RNA polymerase loosely binds the -35 region of the promoter and unwinds the DNA.
C) The sigma factor dissociates from the core enzyme.
D) An RNA transcript if formed and then drops off the DNA template.
E) A polypeptide chain is formed.