4 basic principles of stratification one of them is wealth and the other one is power I need 2 more

Policies that physically separate a minority group from the dominant group.

The array of significant individuals who serve as sources of social support is called the social

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality.potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english