One reason why the mayans were able to expand is because they a. connected with the aztec and ruled the region together. eliminate b. invented a type of gunpowder and used it against their enemies. c. invented the wheel and created important transportation networks. d. could feed a large population because of their complex irrigation systems.

d.could feed a large population because of their complex irrigation systems.

Explanation:

One of the main reasons why the Mayans were able to expand and flourish in the way that they did was because they were able to feed a very large population. As the population expanded, the Mayans required new cities, more infrastructure, more social organization and better transportation routes. All of these factors contributed to the progress of the region.

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