ACCORDING TO THE AUTHOR, THE IMPRACTICABILITY OF USING COAL, OIL SH...

5. According to the author, the impracticability of using coal, oil shade and coal tars as sources of energy is due to:A. their being time consuming B. their being money consumingC. the scarcity of sources D. the lack of technologyPART IV: There is a mistake in four undrlined parts of each sentences. Find the mistakes from A, B, C or D