The purpose of the Eisenhower Doctrine was to<span>aid any Middle Eastern nation requesting assistance against armed aggression from any country controlled by international communism</span><span />
I believe the answer is: Control condition
Control condition refers to the group of subjects that served as a basic comparison for other subjects that receive special treatment in the experiment.
The purpose for a control condition is to make the researchers able to objectively measures how a certain condition or treatment could affect the subjects compared to normal circumtances.
Is this a riddle or something?
<span>The statement that is true about the sovereign state is letter D which is its has borders that are constantly changing. A sovereign state is a state with outskirts where individuals live, and where an administration makes laws and converses with other sovereign states.</span>