Which chown command will change the ownership to dave and the group to staff on a file named data.txt?

Which chown command will change the ownership to dave and the group to staff on a file named data.txt?
A. chowndave/staff data.txt
B. chown -u dave -g staff data.txt
C. chown –user dave –group staff data.txt
D. chowndave:staff data.txt

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