Answer:
The answer is a double-blind study.
Explanation:
A double-blind study is a research method in which neither the participants or the researchers are aware about which group is receiving the treatment. This is done in order to avoid biases such as the placebo effect, as well as preventing accidental cues given by the researchers.
The greatest advantage of this approach is its high validity.
Answer:
Unalienable rights are those which cannot be taken away. They are guaranteed and you can't forfeit or give them up.
Unequal distribution of property