A Copy on First Access replica has been created. The source devices are being used for production operations. When is data copied from the source to the target?

A.
A read or write issued for the first time to a location on the source

B.
A write issued for the first time to a location on the source

C.
All I/Os issued to a location on the source

D.
A read issued for the first time from a location on the source