How might the report be used to explain why governments have the power to make and enforce regulations

The smith family has very little money and no health insurance. a researcher approaches them and promises free healthcare for their three children for 2 years if he can subject the children to a series of experimental vaccines that may have serious side effects. the smith family feels compelled to participate to get the free health care. according to the apa code of ethics, this researcher is in violation of the principle of: