A difference between schools in Nicaragua and Costa Rica is that in Nicaragua it is mandatory to go to school from age 6 to 12, while in Costa Rica you have to go to school from ages 3 to 15. From age 16-18 going to school is not mandatory in Costa Rica.
Answer:
Me gusta hablar con alguien interesante, pero nunca encuentro algo de qué hablar. Siempre que encuentro algo de qué hablar, nadie me pone atención.
Explanation:
I think that you're asking for help to use alguien / nadie and siempre / nunca adverbs. I've used the antonyms of each adverb to create both sentences.
El lago está en la zona montañosa del norte de Costa Rica, unido al Volcán Arenal.
I think its "B" but im not sure.
