A seed is planted in bright sunlight and another of the same type of seed is planted in darkness. The seeds are given the same amount of water and air. The seed planted in bright sunlight germinates in 3 days and grows a long, healthy sprout. The seed planted in the darkness germinates in 3 days and grows a short, thin sprout.
What limiting factor was tested in the experiment with the seeds?
A water
B light
C air