Which statement from this passage is an example of an opinion?

What makes this speech a primary source? o a. the words are spoken by the president himself. o b. it uses narrative to keep the reader's attention. o c. it was written over 70 years in the past. o d. it contains a strong historical argument.

Brainliestttme : ) what economic changes occurred after world war ii? ( economic boom, baby boom, g. i. bill of rights)

List a few examples of city-states that practiced oligarchy in ancient greece