The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.<br>A:to a great extent<br>B:on a great extent<br>C:on mainly<br>D:on only

The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.
A:to a great extent
B:on a great extent
C:on mainly
D:on only

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