Jamie experiments to compare the masses and volumes of different types of toy balls. She places 10 different types of balls in a large bucket of tap water. Out of the 10 balls, six of them float and four sink. Richard wants to replicate her experiment. He also puts 10 toy balls in a large bucket of tap water. Eight of them float. Which of the following gives the most likely reason for the difference between Jamie’s and Richard’s results? Richard used more water.

Richard used different brands of toy balls.

Richard used a bucket with a different shape.

Richard placed the objects in the water more slowly.