Which statements about the Delian League are true?
 




Choose all answers that are correct.

AWhen some city-states tried to withdraw, Athens used force to keep them under control.

BSparta never joined the league and resented Athens’s power and treatment of allies.

CThe league failed to protect Greece from the Persians, and the city-states were conquered.

DThe purpose of the league was to keep Sparta from gaining too much power.