Kyle does an experiment to test the effectiveness of a new type of fertilizer. He predicts that the fertilizer will make plants grow twice as fast as they would without the fertilizer.

After the experiment is complete, Kyle's collected data show that the fertilizer only worked 60% of the time. Kyle decides to remove the data that contradicts his prediction from his published results so that his published conclusion will show that the fertilizer is 100% effective.

The published results of Kyle's experiment
A.
are invalid because experiments cannot be done on plants.
B.
are valid because the fertilizer was over 50% effective.
C.
are valid because scientists should always throw out contradictory data.
D.
are invalid because they are based on incomplete data.