Which of the following best defines the word "aggressive" (Line 3, Para.5)

A．use standardized measurements in the studies of media violence
B．initiated the debate over the influence of violent media on reality
C．assert a direct link between violent media an aggressive behavior
D．use appropriate methodology in examining aggressive behavior

A．More studies should be conducted before conclusions are drawn.
B．It should come to an end since the matter has now been settled.
C．The past studies in this field have proved to be misleading.
D．He more than agrees with the views held by the alarmists.