Answer:
Option A, Coal
Step-by-step explanation:
Coal is the major source of energy in the world. Almost 40 Percent of the total electricity produced in the world comes from coal followed by natural gas (22 %), nuclear power (10%) and others (28%)
Considering the current energy share it is very prominent that in the coming years also the energy production from different sources share will remain the same.
Hence, option A is correct.