Which query is a correctly formatted keyword search?

A.
finance AND diamond OR (reports w/5 false*)
B.
finance AND diamond OR [reports w/5 false*]
C.
finance AND diamond OR [reports w 5 false*]
D.
finance AND diamond OR {reports w 5 false*}
Which query is a correctly formatted keyword search?
A.
finance AND diamond OR (reports w/5 false*)
B.
finance AND diamond OR [reports w/5 false*]
C.
finance AND diamond OR [reports w 5 false*]
D.
finance AND diamond OR {reports w 5 false*}