Hi!
There are C. 100 US Senators.
20: checks and balances!
21: Duties: execute law, enforce law, make laws. who does them? EXECUTIVE branch EXECUTEs laws, LEGISLATIVE branch makes laws, and JUDICIAL branch ENFORCES the laws. making sure they are constitutional.
Answer:
Julio C. Tello, con el apoyo de la Universidad Nacional Mayor de San Marcos. El año pasado se cumplieron 100 años de aquel evento histórico ...