Some species of plants are insectivorous. Why ?

• A. Their growth in shady and dark places does not allow them to undertake sufficient photosynthesis and thus they depend on insects for nutrition.
• B. They are adapted to grow in nitrogen deficient soils and thus depend on insects for sufficient nitrogenous nutrition.
• C. They cannot synthesize certain vitamins themselves and depend on the insects digested by them.
• D. They have remained in that particular stage of evolution as living fossils,a link between autotrophs and heterotrophs .