Answer:
A. Irrigation system dahil ang irrigation system ay kontribusyon ng mga Egyptian.
Explanation:
The first major irrigation project was created under King Menes during Egypt’s First Dynasty. He and his successors used dams and canals (one measuring 20 km) to use the diverted flood waters of the Nile into a new lake called lake "Moeris."
source:
https://www.irrigationaustralia.com.au/about-us/the-history-of-irrigation#:~:text=The%20first%20major%20irrigation%20project,lake%20called%20lake%20%22Moeris.%22
