C is the most likely answer to this question.
They are an invasive species, they kill off our beautiful salmon and other fish that we need to keep a good flow of fish exports and money flowing into our state. It's important to keep that balance so that both the pray and they predator in the lakes don't all die out.
The answer would most likely be sodium because carbon is a plants food, phosphorus is a nutrient in soil, hydrogen is air, but sodium does not have a place in a plant:)
Choice #1 & Choice#4 I believe
