Why is the role of an expert important?

a. people need experts to tell us how we should vote.
b. people are all experts on something.
c. opinions people determine what is right.
d. study and experience bring wisdom which is more valuable than opinion.

i think it is the byzantine empire

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.