It might be this? They stop because tom wants nick to meet his lady and he feels weird.
The answer is B because that is the biggest thing that happened to Nicolo
For much of Jeannette's childhood, Dad's promise to build the Glass Castle represents both the family's hope and Jeannette's hero worship of Dad, but, as Jeannette grows older, the castle comes to symbolize his broken promises.
A (technically B too, but it’s better known for giving women the right to vote)