In the natural world, there often are many different factors associated with the occurrence of a particular outcome. therefore, it is important that we as critical thinkers whenever possible.

rule out rival hypotheses

Explanation:

According to my research on the process of experimental methodology, I can say that based on the information provided within the question it is important that we as critical thinkers rule out rival hypotheses whenever possible. This is because it allows us to focus on the important matters at hand instead of dividing our attention.

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even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .