Read the description of a science experiment below. Which part of the experiment is the third step in the scientific method (testing a hypothesis)?

Sarah wants to create an experiment to determine whether

an object's weight determines how fast it will fall. She

hopes to prove that heavier objects fall faster than lighter

ones. She buys two weights that have the same size and

shape. However, one is heavier than the other. She has her

mother drop both weights at the same time from a

window. To her surprise, the weights land at exactly the

same time. She repeats the experiment several times, but

the weights always hit the ground at the same time, Sarah

is forced to admit that she was wrong; an object's weight

does not affect how fast it falls.