The author's main criticism of John Lott is that he ______.

A．It has little influence on the forum sponsored by the Crime and Justice network.
B．Neither supporters nor opponents of gun control cite the works of scholars.
C．The works of mainstream social scientists have great impact on it.
D．Many social science historians have so far failed to take part in it.

A．illustrate the influence they have on the issue of gun control
B．refute the claim that private ownership of firearms will deter violent crimes
C．support the thesis that gun ownership leads to more violence
D．demonstrate why research methods should be improved in the study of the gun ownership history