Answer:
b) Negative reinforcement
Explanation:
Negative reinforcement happens when something unpleasant for the individual (in this case the picnic), is removed due to the individual's behavior (meeting this month's sales).
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Sloths are xenarthrans – their closest relatives include anteaters and armadillos. And, among other things, large, curved claws and powerful forelimbs for digging are common xenarthran traits. It's likely that the last common ancestor of two- and three-toed sloths shared these features, too.
What is the multiple choice?
B. Would be the answer because battles happen in wars
Macbeth has been adapted so many times for the same reason why all Shakespeare's plays have been adapted so many times. It is because they are not bound to a single point in time and by changing temporal details it can be applicable to any society at any time. The theme that is "power corrupts" has been ever present and this is why it keeps getting adapted.