Context: Molly gets a basketball for her birthday and dribbles it around her neighborhood. She notices that sometimes the ball bounces higher than other times. She wonders what factors affect how high her ball bounces. So, she decides to design an experiment. She has the following supplies available:
one basketball
access to a brick patio
access to a grassy lawn
access to a gravel driveway
a meterstick
Using only these supplies, which question can Molly investigate with an experiment?
A. Does the basketball bounce higher on a lawn or on a dirt path?
B. Does the basketball bounce higher on gravel or on grass?
C. Do larger basketballs bounce higher than smaller basketballs on a brick patio?
From the given choices, choose the correct answer and respond with the letter of that choice.

B