Hi there. The way this question is stated is going to need some input from you to infer what was meant by the language. 
This answer would be True. Because opportunity cost means more of one and less of another in simple terms, since in an economy we cannot utilize all of our resources at one time. 
But I would caution that the language is in the simplest of terms! Since a more thorough definition would be that opportunity cost is the amount lost by not taking the next-best alternative. If your teacher and lesson usually describe opportunity cost and other terms simply, then I would say to go for it and choose True. 
But if your lesson seems to be strict on definitions, then maybe that isn't the best definition. I would say it is good enough though because although simple, it does encompass the whole idea. 
I hope this helps!
        
             
        
        
        
senators wanted to make changes to this part of the charter of the League of Nations. President Wilson didn't want this to occur. as a result, we not only didn't join the League of Nations, we didn't ratify the Versailles Treaty. We ended up signing separate peace treaties with the Central Powers
 
        
                    
             
        
        
        
Answer: False 
Explanation:
The Rolling Plains is a region in the United States of America that is located towards the south of the Great Plains in central USA and to the east of the High Plains Ecological Region. 
The landscape of the great plains does not include caprocks and instead is comprised for the most part, of a short grass full Savannah populated by native plants such as bluestems, gramas, and Indiangrass. 
 
        
             
        
        
        
Answer:
Queen Elizabeth achieved many things as Queen! Such as the defeat of the great Spanish Armada (which is regarded as one of the greatest military victories in English history) and the Elizabethan Religious Settlement (which provided a long lasting middle way between Roman Catholicism and Protestantism).
Explanation:
Elizabeth I established Protestantism in England, defeated the Spanish Armada in 1588, maintained peace inside her previously divided country, and created an environment where the arts flourished. She was sometimes called the "Virgin Queen", as she never married.
 
        
             
        
        
        
Social services, united nations, hospitals, Childrens hospital charity funds.