Use the table of data from an investigation to answer the question.

Mass of ball (grams) Time to hit ground (seconds)
10 1.02
15 1.01
26 1.62

A student is investigating gravity and falling objects. She drops three balls and times how long it takes each ball to hit the ground. What is the most likely source of error?
(1 point)
Responses

She did not measure the circumference of the balls.
She did not measure the circumference of the balls.
She did not measure the mass after the balls hit the ground.
She did not measure the mass after the balls hit the ground.
She used balls that are different sizes.
She used balls that are different sizes.
She dropped the balls from different heights.

The most likely source of error in this investigation is that the student used balls that are different sizes. This could affect the results because objects with different sizes and shapes may experience different air resistances, leading to different times for them to hit the ground.