The first people to establish a civilization in Mesoamérica are believed to have been

A. The Olmec

B. The Iroquois

C. The Aztecs

D. The maya

In Mesoamerica, initially, it is believed that the civilization was established by the A. Olmec.

Explanation:

Mesoamerica civilization presented a different kind of civilization as compared to ancient Egypt, China and Mesopotamia. The area of Mesoamerica covers North America and parts of the Southern American countries such as Central Mexico, Costa Rico, Honduras and many more.

Agriculture began as early as 7000 BCE establishing stable societies and reducing the hunters-gathers lifestyle. There was also the establishment of religious and social gathering and interactions such as ball playing and calendar system. In addition the societies, established trade routes, developed their own architectural styles and many more.

A. Olmec

Explanation:

The first complex civilization to develop in Mesoamerica was the Olmec, who inhabited the gulf coast region of Veracruz throughout the Preclassic period.