What is the name of the upper house of Congress, composed of 128 members elected for six-year terms, with each state electing three senators and the remaining allocated by proportional representation?

• A Camara de Diputados
• B Asamblea Legislativa
• C Congreso de la Union
• D Camara de Senadores ✓

The Senate (Camara de Senadores) shares legislative power with the Chamber of Deputies and holds exclusive authority over foreign policy analysis and treaty ratification.