Conduct Disorder Has an Incidence of 6% Among Children Exposed

Conduct Disorder has an incidence of 6% among children exposed to (one of) risk factors A,B,or C,but an incidence of 15% when persons are exposed to two of these risk factors,and 26% when exposed to all three.This is most consistent with

A) impact of risk at the macrosystem level.
B) impact of risk at the microsystem level.
C) the impact of cumulative risk.
D) the need for an ecological approach to MHP.
E) the need for mental health promotion vs.prevention.