The Soviet Union defeated Germany at Stalingrad, marking the turning point of the war in Eastern Europe. American and Allied troops landed in Normandy, France, on D-Day to begin the liberation of Western Europe.
They wanted to escape war and other political problems.
The president must be a natural-born citizen of the United States, be at least 35 years old, and have been a resident of the United States for 14 years.
Answer:
The answer is double blind experiment.
Explanation:
In a double blind experiment, neither the researchers nor the participants are aware about which group is receiving the experimental treatment. This is done in order to prevent biases in the participants' judgment (the placebo effect), and prevent the researchers from giving accidental cues.
The greatest advantage of double blind studies is they have greater reliability and validity than other types of studies.
The factors would probably being women who gave birth and women who took care of the house hold
