Environmental Science
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The answer is C.
Passive communicators will keep their opinions unvoiced and to themselves in stressful or complex situations. Passive means to be inactive in how you act and react to any situation, it is when you take a stand back and either don't get involved in situations at all or you don't let your opinions known to others. It's like being in the background in situations.
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B. Assumptions might cause a conflict because of how a person was raised
If I had to choose I would have said A, he's going against telling his family that he believes it's important but as well as that his disregard to commitments can always make you feel like you're slipping away from your own judgement of character and in result has made himself feel bad about telling his family one thing and doing another. To achieve a fluid family life commitment and urge to stay in contact is a necessity even going through work and school, there is no harm in putting some time aside for family.