1) D.
2) A. (??)
3) B.
4) "Some of these nouns are pretty amusing."
It would be 3 days because if there are 30 chickens at first and you can feed them for 4 days, then there must be 120 pieces of chicken food. If you have 40 chickens, then you have to divide 120 by 40 which gets you 3 days.
Answer:
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B. The benefit lost when choosing between 2 options
Answer:
both, it's a balance between to opposite to become one