Read the text below and answer the question.
"Before her volunteer trip to Africa, Emily had many preconceptions about the continent. Working closely with local communities, building schools, and teaching children opened her eyes to the resilience, joy, and resourcefulness of the people. This experience fundamentally changed her perspective on global development and her own place in the world."
What was the most significant impact of Emily's volunteer trip?
A) She helped build schools and teach children.
B) She visited Africa for the first time.
C) She learned about global development.
D) Her preconceptions about Africa were challenged and her perspective changed.
E) She realized the people were resilient and resourceful.