Approximately How Much Total Biomass of Plant Material Would Hypothetically

Approximately how much total biomass of plant material would hypothetically be necessary to support six carnivorous lions (whose diet consists only of herbivorous prey) , each weighing 50 kg, living in a given area along with their prey, on an ongoing basis? (Assume a 10% efficiency in energy transfer.)

A) 130,000 kg
B) 30,000 kg
C) 3,000 kg
D) 1,500 kg