The length of the wall is 4,018 meters , their average height is 12meter , and the average thickness is 2.5 meters(8.5 feet) . The walls contain 34 watchtowers and seven main gates open for traffic,with two minor gates reopened by archaeologists.."
correct answer is: As soon as I get paid.
Answer: C) She didn't randomly assign participants to the experimental and control groups.
Explanation: It is necessary to randomly assign people to hot or cool units becasue if you give people a choice, they will automatically select the room with the temperature they prefer which would overthrow the point of the experiment.
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