I believe the answer is: double-blind experiment
In double blind experiments, the subjects that receive the treatment is remained unknown by both the researchers and the subjects until the experiment is finished. The main purpose of double-blind experiment it eliminate the bias of perception that might exist among researchers.
The merit system
hope this helps
1) began
2) I will add up all the salaries and divide by the total number of items, I will give you the mean, but be careful when interpreting the mean because it might be misleading.
3) was
4) me
5) precedence
6) formally
7) Argument
8) Recommendation
9) Receipt
Always the member with the most seniority
The reason for all 3 is B. religious freedom.