Wastes that cannot be reused, recycled, or pose a  problem in disposing of in landfills are treated by

Incineration is a process of high-temperature and dry oxidation that results in a  significant 

reduction of waste volume and weight. Wastes that cannot be reused, recycled, or pose problems in disposing of in landfills are treated by incineration. 

Wastes that cannot be reused, recycled, or pose a problem in disposing of in landfills can not be treated by deep burial. So it is an incorrect option. 

Therefore, the correct answer is option (A).