In Terms of Generating Electricity,fuel Cells Are ________ Than Thermal-Conversion

Multiple Choice

In terms of generating electricity,fuel cells are ________ than thermal-conversion machines because the chemical energy of a fuel is ________.

A) less efficient;converted into electricity with an intermediate combustion cycle.
B) less efficient;converted directly into electricity without an intermediate combustion cycle.
C) more efficient;converted into electricity with an intermediate combustion cycle.
D) more efficient;converted directly into electricity without an intermediate combustion cycle.
E) about the same in terms of efficiency;converted into electricity with an intermediate combustion cycle.