A student performed an experiment to study the role of sunlight on the germination of seeds. The table shows the data from his experiment. Based on the experiment data, the student concluded that sunlight is not essential for the germination of a seed, as long as it is watered regularly. How is this conclusion biased?
A) The pots were in the sun; the seeds were not.
B) Two different specimens were used for the experiment.
C) He has not tested the germination in the absence of sunlight.
D) It is a known fact that light is essential for a plant to grow.