One Problem with Relying Too Heavily on Risk-Factors in Prevention

One problem with relying too heavily on risk-factors in prevention of CSA is that ______?

A) there are always some margin of children who are victims of CSA that do not fit within the risk factors
B) the risk factors are not empirically reliable
C) there have not been all that many identified risk factors
D) the risk factors have been collected using sample data and thus the risk factors do not account for all children