It was Lenin.
It cannot be Stalin, because Lenin is his predecessor and it is with Lenin that the central planning and communism was introduced to what was then Russia.
Karl Marx and Engels created together communism, but didn't introduce it specifically to Russia. They wrote their ideas and they spread all around the world and Lenin was inspired by them.
The correct answer is Aztec.
Explanation: The Aztecs were the main Mesoamerican civilization and one of the main pre-Columbian civilizations. They built their capital in the mid-fourteenth century and had a rich culture that inherited elements from various peoples of Mesoamerica (Central American region that corresponds to countries like Mexico, Guatemala, El Salvador etc.), such as Toltecs and Mayans. Their society was hierarchical, each having its own specific role.
Research scientists used a standard practice called the scientific method to help them understand phenomena.
Answer:
A - infrastructure!
Explanation:
Brainliest please! hope i helped