As the costs of goods and services go up over time, the government raises the benefit levels for social security recipients to account for so-called cost-of-living adjustments. this is an example of what concept?

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: