GIVING BRAINLIEST AND POSSIBLY REPORTING WRONG ANSWERS Which statements about Pangaea are true according to widely accepted theories? Check all that apply.

A : Pangaea existed two hundred thousand years ago.
B : The landmass of Pangaea split into separate continents over time.
C : Pangaea was discovered by Christopher Columbus.
D : Pangaea was surrounded by the waters of the ocean.
E : The coastline of Pangaea stayed consistent over time.

1. a chinese general founds the song dynasty

2.yangdi builds the grand canal

3.A chinese printer invents movable type

4. The Sui dynasty reunites China

Explanation:403 - 221 BC: The Warring States period. During this time leaders from different areas were constantly fighting for control.

342 BC: The crossbow is first used in China.

221 - 206 BC: Qin Dynasty

221 BC: Qin Shi Huangdi becomes the first Emperor of China. He has the Great Wall of China built by extending and connecting existing walls to protect the people from the Mongols.