The first Mesoamerican civilizations began when;

A/ Right after people crossed the Bering land bridge.
B/ When nomadic hunters settled in the Valley of Mexico.
C/ Once people learned how to farm in the tropical forest.
D/ When the Maya built the first cities in Central America.

B/ When nomadic hunters settled in the Valley of Mexico.

thanks whoever answered

The first Mesoamerican civilizations began when nomadic hunters settled in the Valley of Mexico. (Option B)

To find the correct answer to this question, we need to understand the historical context of the first Mesoamerican civilizations. Mesoamerica is a region that includes parts of present-day Mexico and Central America. Now, let's evaluate each option to determine the correct answer:

A/ Right after people crossed the Bering land bridge: This option refers to the migration of people from Asia to the Americas across the Bering land bridge. While this migration did occur, it is not directly linked to the beginning of the Mesoamerican civilizations.

B/ When nomadic hunters settled in the Valley of Mexico: This option suggests that the Mesoamerican civilizations began when nomadic hunters settled in the Valley of Mexico. The Valley of Mexico is an important region where several ancient civilizations thrived, so this option seems plausible.

C/ Once people learned how to farm in the tropical forest: This option highlights the development of agriculture in the Mesoamerican region. Agriculture played a significant role in the growth of civilizations, so it could be a possible answer.

D/ When the Maya built the first cities in Central America: This option claims that the Maya built the first cities in Central America, which would mark the beginning of Mesoamerican civilizations. While the Maya did contribute to the Mesoamerican civilizations with their advanced cities, it is important to consider if they were the very first civilization.

Based on this analysis, it is most likely that the correct answer is either option B or option C. To determine the precise answer, it would be best to consult historical sources that specifically detail the beginning of the Mesoamerican civilizations.