Fertile Crescent
The Fertile Crescent (also known as the "cradle of civilization") is a crescent-shaped region where agriculture and early human civilizations like the Sumer and Ancient Egypt flourished due to inundations from the surrounding Nile, Euphrates and Tigris rivers.
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.
Answer: A
Because: everyone has to get a wage & it will certainly be more determined on wages
Canines
Are
Every
Souls
Ambience
Relaxation