Ancient chinese civilization originated in the valleys of the
a. yangtze and mekong rivers.
b. lo min and hainan rivers.
c. yellow and yangtze rivers.
d. indus and lumai rivers.
e. nanjing and hunan rivers.

China has one of the oldest and most interesting civilization through the years. Its origin was situated between the Yellow and the Yangtze river, the denser population being along the Yellow river. China's first civilization was the Shang Dynasty (1600 BC) during the Neolithic era.

4.a depression is the answer