Which Statement Best Describes the Role of ATP Hydrolysis by the Transcriptional

Which statement best describes the role of ATP hydrolysis by the transcriptional terminator Rho?

A) ATP hydrolysis induces a conformational change in the stem-loop structure of the terminator sequence.
B) ATP is used strictly to load Rho onto the mRNA.
C) ATP fuels the travel of Rho along the RNA and dissociation of the RNA-DNA duplex.
D) ATP fuels the travel of Rho in the direction opposite of transcription, resulting in a head-on collision between RNA polymerase and Rho.