From my personal life I'd say B is what I have lived by since I started working out, I also think schools would say the same, I am not %100 sure but this is my input.
Answer:
This can be described as a commitment.
Explanation:
From a psychological point of view, we can say that when Janis swept the kitchen's floor, she committed herself to have a clean house so that she can invite her friends. She is directing her activities to reach a goal and is easier because after sweeping the kitchen she is mentally predisposed to reach her goal of keeping the house clean.
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