Ella es de guatemala.¿de dónde eres? ¿de dónde es ella? ¿cómo es ella? ¿cómo se llama ella?

For this case, we have the following
 "Ella es de Guatemala"
 What we should do in this case is to find the right question to the answer.
 In English the answer is:
 She is from Guatemala.
 Therefore, the question is:
 Where is she from?
 In Spanish, the translation to this question is:
 ¿De dónde es ella?
 
 The correct question for the given answer is:
 ¿De dónde es ella?

Ithink its b) built underground reservoirs

The answer is b.a, c, and d are not correct