According to the article, which of the following would be included as part of the Aztec's complex irrigation and waterway systems? A..Crop rotation results in the growth of less food so that when attacked by enemies, they cannot take food as a prize of war.

B... Crops are rotated so that the people do not have to eat the same thing every day of the year.

C... Crop rotation involves different groups of people working crops each year. That way, different groups can experiment with their own methods to see which is the best.

D...Crops are rotated because different crops use different nutrients in the soil. By rotating crops, you don't destroy the soil and crops can continually be planted.