What can coal be converted to? 

A)  bitumen 
B)  synthetic oil sand 
C)  synthetic natural gas 
D)  radioactive isotopes

Coal can be converted into synthetic natural gas through a process called coal gasification. This involves breaking down the coal into a gas mixture that can be further processed to remove impurities and produce methane, which is the main component of natural gas. This process allows for the production of cleaner burning fuel from coal. Bitumen and synthetic oil sand are products of oil sands, not coal, and cannot be produced through conversion of coal. Radioactive isotopes are not produced through conversion of coal and are a separate category of materials.