Which statement concerning the evolution of species A, B, C, D, and E is supported by the diagram below?A) Species B and C can be found in today's environments. B) Species A and D evolved from E. C) Species A and C can still interbreed. D) Species A, B, and E all evolved from a common ancestor and all are successful today.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.