Which scenario is the best example of an opportunity cost?

How does iraqs geographical location ( desert-like environment ) affect it's politcal relationships? i've been stuck on this and i'm giving a lot of points

Many had hoped that a compromise would be reached to prevent further nation divide. which compromise do you think could have best prevented the civil war from occurring? explain why or why not using details from the lesson.

The northwest ordinance guaranteed three rights for the settlers of the northwest territory. what were they?