The answer is the Gettysburg address, this is the famous speech starting as, "four score and seven years ago...."
Due to decreased light penetration, B. THE MOUTH of the rivers and streams will have less diversity of plant life.
The decreased light penetration is brought about by the murkiness of the water due to numerous deposits of sediments. Sediments that have been collected at the water travels towards the mouth of the rivers and streams causes the water to be muddy and murky making it impossible for light to penetrate.
True they did won the battle is true because I just looked it up