Answer:
I would go with D, you didn't attach a diagram though
Explanation:
The Maya Civilization developed advanced mathematics. This is one of their main achievements.
They had a slave trade (a is wrong) , the leader was typically an inherited title (b is wrong) , and they definitely traded with other civilizations (c is wrong).
They fight for our country.
Answer is B, the railroad system going through the cities.
Karim Al Makhdum. Ito ang tamang sagot
In germany it was called Wandel durch Annäherung
They Made a contract called Grundlagenvertrag