I believe it's candidates :)
1, 2, 3 and and the second 2. I hope I could help. Have a wonderful rest of the day.
<span>Advances that were made during the Han Dynasty:
Predict eclipses of the sun
Doctor's created new medicines
Chinese language grew from 3000 to 9000 characters
Paper was invented
Wheelbarrows and fine vases and china
Seismograph</span>
Competition between european countries such as portugal and spain affect overseas exploration and expansion, they didn´t want to go to America, they both wanted to go to Asia, and Africa, trade with asia, get their riches, improve technology and covert people to Christian. Christopher Columbus wanted to go to Asia when he found america, as a result of all that competition, spanish and portuguese established colonies in america.