Question

what did the scientists hope to learn from their study?
how people get their things back
how buildings are repaired
how survivors are rescued
how people behave after a disaster

Explanation:

To determine the answer, we analyze the options. The question is about what scientists hoped to learn from their study. Options about retrieving things, repairing buildings, or rescuing survivors are more specific actions. Studying how people behave after a disaster is a broader, more typical scientific study focus (related to social science, e.g., psychology/sociology of disaster response). So the most logical option is the one about people's behavior after a disaster.

Answer:

D. how people behave after a disaster