An indication of a diesel engine air intake being partially clogged, is （）.<br>A:low firing pressure and low exhaust temperatures<br>B:low firing pressure and normal exhaust temperatures<br>C:high firing pressure and low exhaust temperatures<br>D:high firing pressure and high exhaust temperatures

An indication of a diesel engine air intake being partially clogged, is （）.
A:low firing pressure and low exhaust temperatures
B:low firing pressure and normal exhaust temperatures
C:high firing pressure and low exhaust temperatures
D:high firing pressure and high exhaust temperatures

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