Answer:
(A) the olmeca is the correct answer.
Step-by-step explanation:
The olmeca is the earliest known civilization in North America.
There are several reasons which have made the Olmecs important such as
Olmecs important such as they have produced various things culturally, religiously that were later utilized by Mayans and Aztecs.
The Olmec civilization created the first stone monuments in North America,also constructed the head pyramids,developed immense monuments and began writing in the Americas.