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Suppose Maria is painting while the sun is setting; once she notices that the room is getting darker, she decides to call it quits for the day. This example illustrates the role of ________.a) thresholdb) a just-noticeable difference

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Answer:

b) a just-noticeable difference

Explanation:

The role of a just-noticeable difference best describes what is happening to Maria because as the sun is setting the room becomes darker and the light required to finish the painting would be affected requiring an introduction of an artificial light.