An independent clause must contain a
a. subject
b. subject and a predicate
c. predicate
d. subordinate clause

An independent clauses must contain subject and predicate. The correct answer is B.  An independent clause must express a complete thought.       For example, Karen reads. Karen is the subject and reads is verb (predicator).

do you know the answer?

answer: dinner and a movie with your friends this saturday night.

opportunity cost refers to the benefits that a person or business misses out on when choosing one alternative over another. opportunity costs are easy to miss, but they can be important for decision-making. in this example, the alternative that the person will miss out on is the opportunity to have dinner and watch a movie with friends on saturday, as he will have no money left after buying the cd.