The degree to which the viscosity of an oil will change with a change in temperature is indicated by the （）.<br>A:weight designation<br>B:viscosity index<br>C:pour point<br>D:thermal change value

The degree to which the viscosity of an oil will change with a change in temperature is indicated by the （）.
A:weight designation
B:viscosity index
C:pour point
D:thermal change value

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