Which RDF modes connect the source R1 volume to the two target volumes in a functioning SRDF/Star en

Which RDF modes connect the source R1 volume to the two target volumes in a functioning SRDF/Star environment?

A.
Synchronous and Semi-synchronous

B.
Synchronous and Asynchronous

C.
Synchronous and Adaptive Copy

D.
Asynchronous and Adaptive Copy