Scientists control the variables in science experiments, specifically the independent variables. When a scientist changes a variable, they observe how it affects the other variables.
The feudal system of medieval Europe was based on mutual obligations , or personal bonds , between the king and his vassals rather than having been based on social or political relationships .
That's all I know
hostile attitudes toward<span> gays. Thats theanswer
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The answer is A because Ed got payed less than Julie.