Liz and Michelle are testing which ball will bounce the highest. They test 4 different balls. Each ball is dropped five times from the same height. The height of the bounce is measured. At the end of the experiment, the data for each ball was averaged to obtain an average bounce height. Is this a well designed experiment?

A)No, it does not give any data.

B)No, they should have used more types of balls.

C)Yes, they tested more than one thing at a time.

D)Yes, they averaged the measurements and had multiple trials.