What are the correct statements about the description of "rechecking" the origin on the Rainbow...

What are the correct statements about the description of "rechecking" the origin on the Rainbow server? (multiple choice)

In the Awindows scenario, if the source host or agent is restarted, it must be checked again.

B. Rechecking will make the task associated with the origin unavailable.

C. Before each data synchronization, the source end needs to be rechecked.

D. When the associated task at the source end is being executed, it cannot be rechecked.