Choose the correct statements

A. Length of the food chain is generally limited to 3-4 trophic levels due to energy loss.

B. Length of food chain depends upon the producer 

C. In hydrarch succession, lichen is the pioneer community 

D. Removal of most of the carnivores in an ecosystem results in an increased population of deer 

E. Removal of 80% of top carnivores results in greatly increased growth of vegetation 

Choose the correct answer from the options given below