Which CLI command copies a file called 4-0-0.rel from FTP server userpc to the router?

Which CLI command copies a file called 4-0-0.rel from FTP server userpc to the router?

A.
get 4-0-0.rel userpc:4-0-0.rel

B.
get userpc:4-0-0.rel 4-0-0.rel

C.
copy 4-0-0.rel userpc:4-0-0.rel

D.
copy userpc:4-0-0.rel 4-0-0.rel

Explanation: