What civilization is considered the mother-culture of pre-hispanic mexico ?
a. maya
b. olmec
c. aztec
d. san lorenzo

The correct answer is - B. Olmec.

The Olmec civilization is a very advanced civilization in its time of existence, and it was prospering between the period of 1,200 BC until 400 BC. This civilization was located in the lowlands of south-central Mexico. It is considered as the mother-culture of the later civilization in Mesoamerica, such as the Maya, Aztecs, and Toltec civilizations. The reasons for their demise are still unclear, and there's multiple theories about it. As a trademark of this civilization can be considered the large carved stone heads, about which there's still a lot of debate about their purpose and means.

i beleive d is the right answer