According to theory, a person asks the following questions before completing a task: "Can I accomplish this task?," "If I do accomplish it, what is my reward?" and finally, "Is the reward worth the effort?"

EXPECTANCY THEORY.  

Explanation: The expectancy theory proposes that an individual will behave or act in a certain way because they are motivated to select a specific behavior over others due to what they expect the result of that selected behavior will be. In 1964, Victor H. Vroom developed the expectancy theory and defined motivation as a process governing choices among alternative forms of voluntary activities, a process controlled by the individual.

an aneroid barometer is different from a mercury barometer in that it provides readings that increase as air pressure increases.

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the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.