One Way to Help Estimate Prevalence of Intimate Partner Violence

One way to help estimate prevalence of intimate partner violence and to help decrease selection and recording biases are through sampling survey methods. A weakness of this technique is

A) the methods are subject to self-reporting biases
B) it may fail to sample some groups with high prevalence of abuse, i.e., the homeless
C) the definition of abuse may be defined differently by each researcher
D) all of the above