Answer:
Opportunity cost is when you have a choice between a number of things. The thing/things you didn't choose are the opportunity cost, if that makes any sense.
Explanation:
I learned this in fith grade science
Answer:
Credential is the word which you require.
Because it was popular duh
Answer:
C.
Explanation:
He expresses his care, in promising to take care of Paul's bullies tomorrow.
This means he, in this situation specifically, is close to Paul; however, if this excerpt is reflecting on an event from the past, and things have changed since this situation the answer is D.