Conduction is inhibited by equal temperatures, as it prevents a temperature gradient necessary for heat transfer. Other factors like mass differences do not stop conduction but may affect its rate. Therefore, equal temperatures are the condition that truly prevents conduction from happening. ;
Conduction is prevented from occurring when two objects are at equal temperatures, as there is no temperature gradient to drive heat transfer. Other factors, such as mass or differing temperatures, do not prevent conduction. Therefore, the correct answer is C. Equal Temperatures.
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