Julian was investigating different ways to grow plants. He had already tested a homemade greenhouse, different fertilizers in soil, and several other methods. For his next trial, he wrapped a moist paper towel around pea seeds, placed them in a clear plastic bag, created an opening in the bag for air, and taped the bag to his window. In just a few days, his seeds had begun to sprout like the one shown in this image.

What conclusion can Julian draw about pant growth based on his last investigation?
Responses
A Seeds grow best higher off the ground, where gravity is weakest.Seeds grow best higher off the ground, where gravity is weakest.
B Seeds grow best when they are in contact with plastic materials.Seeds grow best when they are in contact with plastic materials.
C Seeds grow better indoors next to a window than they do outdoors.Seeds grow better indoors next to a window than they do outdoors.
D Seeds do not need soil to grow, but they do need light, air, and water.

D Seeds do not need soil to grow, but they do need light, air, and water.