You Notice That Two Small Birch Trees Sprout and Begin

Multiple Choice

You notice that two small birch trees sprout and begin to grow among the sunflowers that sprouted naturally in your garden. The birch trees are slower growers than the sunflowers that had sprouted, but by the fifth summer they start to shade the sunflowers. The birch trees and the sunflowers are in competition for:

A) water.
B) light.
C) nutrients.
D) All of these choices are correct.