According to the passage, Cooper’s lawyer ______.

A．like animal fights, competition is a necessity and war is inevitable
B．competition becomes war when it grows more and more fierce
C．when social entities serve one another, opposition means cooperation
D．while competition is unavoidable, war is not a necessary outcome

A．describing a phenomenon and explaining its causes
B．outlining a position and supporting it with statistics
C．isolating an ambiguity and clarifying it by definition
D．presenting a problem and advocating a solution for it