The following questions refer to the description below.
Soil can be considered a complex ecosystem because it contains inorganic particles,minerals,water,and a large diversity of living organisms that all interact with one another.Plants need soil to grow and humans depend on plants for food,building supplies,a source of heat,etc.
-Since soil provides plants with a substrate for support and water,minerals,and oxygen,what is a plausible hypothesis to explain the evolution of carnivorous plants?

A)Not all soils are rich in nutrients, and parasitic plants that live in soils that are poor in oxygen and carbon can supplement their needs by digesting animals.
B)If plants that consume insects grow faster and have higher reproductive success, then carnivory is adaptive.
C)These plants have a mutant gene that decreases photosynthetic output.
D)Carnivorous plants are rare and compete poorly with noncarniverous plants.
E)Carnivorous plants are parasites on many invertebrates and small vertebrates.