Nosotros somos de Guatemala.
Because ser is for more permanent things, like character traits or nationalities, while estar is more for temporary things like feelings or current location
How to remeber ser and estar easy
for how you feel or where you are, always use the verb estar
Miraron
hope this helps you!
Answer:
B. ponerse
Explanation: porque estas hablando de que se va poner , because you are talking about what is she going to wear and that is B