Answer:
c. The exact amount of nonrenewable energy resources is not currently known.
Step-by-step explanation:
The bookkeeping of reserves produces many disputes as the most optimistic estimates by companies, and the most pessimistic by environmental groups and academic scientists. The confrontation is more visible in the field of hydrocarbon reserves; Here, the former tend to present as reserves all the known deposits and those that are about to be known. The latter emphasize how much the cost of exploration and extraction has increased, with only one new barrel found for every four consumed, and the increasing thermodynamic (energy) cost, which decreases the average use value of the new findings