Respuesta :
The question not answered in the sentence is option D) “why” because it does explain why his novel made him achieve international success.
Option A) “who” is mentioned in the sentence since it refers to “García Márquez”.
Option B) “what” is also mentioned in the sentence “achieved unusual international success”
Option C) “when” is also answered in the sentence as it provides the year the book was written (1967)
