Answer: It allowed trains to carry large loads
Explanation: Got this right on a test :)
The correct answer is <span>Great Zimbabwe
These buildings were sometimes even over 5 meters long and were made out of bricks that were stacked on top of each other. The constructions are huge and there are many anthropologists who claim that these constructions are second in their greatness only to the great pyramids in Egypt because of how massive and unique they are.</span>
I hope this help to be honest and U can just search it up online
C. Both A and B is the correct answer