Question

meso - american people known for developing a calendar system, astronomy, and hieroglyphics. (sswh10a) aztec hernan cortes mayans francisco pizzaro

Explanation:

The question refers to a Meso-American civilization with advanced calendar systems, astronomy, and hieroglyphic writing. Hernan Cortes and Francisco Pizzaro are Spanish conquistadors, not Meso-American peoples. While the Aztecs had some astronomical knowledge, the Mayans are specifically renowned for their highly sophisticated calendar systems, advanced astronomical observations, and complex hieroglyphic script.

Answer:

C. Mayans