C. Nobody knows
Explanation:
"One by one, the Classic cities in the southern lowlands were abandoned, and by A.D. 900, Maya civilization in that region had collapsed. The reason for this mysterious decline is unknown, though scholars have developed several competing theories." History channel
Hope this helps! :D
1. Yo te pido dinero a ti
2. La vendedora nos muestra machas chaquetas a Laura y a mí
3. ¿Quién paga los estudios a Manuel?
4. ¿A usted le están explicando la verdad? ---> it doesn't has sense but it's right
:)
Answer:
This is the answer of your question. ☺☺