According to the exhibit, R1/BCV on Symm321 and R2 on Symm654 is pair 1, and R1/BCV on Sym654 and R2 on Symm987 is pair 2.Which of the following commands is utilized for the control SRDF device operations on these two pairs?

A.
Symmir -rdf Jcv symrdf -rbcv

B.
Symrdf Jcv symrdf -rdf -bcv

C.
syumrdf symrdf -rbcv

D.
Symrdf -bcv symrdf brbcv