How is citizenship in the United States different from citizenship in ancient Athens?

A person has to be born to parents who are US citizens to become a citizen.
People born in other countries can apply to become a citizen of the United States.
Only male citizens can become citizens of the United States and vote in elections.
Women are unable to become citizens of the United States but can vote.

How did european exploration and expansion cause the african slave trade to expand? a. european explorers discovered the slave trade and expanded it across the indian ocean into south asia. b. arab armies captured european explorers and forced them into slavery. c. european traders shipped enslaved africans to work on plantations in european colonies in the americas. d.european explorers captured african people and forced them to work on their ships.