He rigorously outlined tenets for tragedy.
Nonpartisan democracy also could be communism or fascism
Answer:
Source b is imperialistic while source d is not
Explanation:
Guessing from similar questions that have had this same output in the past. Please include a screenshot when asking questions like this. Sounds like a MS question so this should be in the ballpark
Opportunity cost is the value of the next best alternative forgone as a result of making a decision.