In the Transcription-Coupled Repair Pathway,how Is the Presence of a Lesion

In the transcription-coupled repair pathway,how is the presence of a lesion thought to be detected?

A) There are special enzymes that scan the DNA for such lesions.
B) The lesion may be signaled by a stalled RNA polymerase.
C) The lesion may be signaled by a stalled DNA polymerase.
D) The lesion may be signaled by a stalled peptidyl transferase.
E) The lesion may be detected single-stranded binding proteins.