Which format for citing references is not right?
A.
[10] studies the strategic implications of forward contracting in commodity markets that exhibit an oligopolistic structure.
B.
The strategic implications of forward contracting in commodity markets that exhibit an oligopolistic structure have been studied [10].
C.
Liski and Montero studied the strategic implications of forward contracting in commodity markets that exhibit an oligopolistic structure [10].
D.
Reference [10] studies the dynamic vehicle routing problem.