A lever is a kind of wall that can help keep floodwater out of cities. Justine researches and
the weak points in her levee By fixing hem, she can make an even better levee
How can Justine use her model to make her levee design even better?
A. She can test the model until the levee fails.
B. She can take it apart and put it back together for practice.
C. She can test the model to show that it works.
D. She can take it apart so she can use the pieces again.
