Why was irrigation important to Sumer? A. It led to the invention of the sail.
B. It helped create food surpluses.
C. It led to trade with other city-states.
D. It moved water from mountains to city-states.

B. It led to trade with other city-states.

Explanation:

1. where does the energy of a nuclear power plant come from?

d) political bosses should not hold office

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.