Well
You are cool = Eres guay
Idk about your cool
They do that because it may not be said normally, it may have an accent attached along with it.
It should be C. Esas.
Because "esas" means them/they, but in feminine form. So if we translate the sentence it would be: "Those/The girls in the picture are my cousins Malena and Alejandra"
Hope that helped :D
Answer:
Mexico city is the capital of mexico
