What conductor property is indicated by 'C'?

The correct answer indicates that the conductor has a property that makes it resistant to corrosion. Corrosion resistance is a critical property for electrical conductors, especially in applications where the conductor may be exposed to moisture, chemicals, or corrosive environments. This characteristic helps to maintain the integrity and performance of the conductor over time, ensuring reliable electrical conductivity and reducing the risk of failures that can occur due to degradation from atmospheric conditions or chemical exposure.

Heat resistance, while also an important property for conductors, refers to their ability to withstand specific temperatures without losing performance or structural integrity. The other options focus on particular heat resistances (to 167°F and 194°F) rather than corrosion, which is the defining characteristic of the correct answer. Additionally, being appropriate for direct burial is another specific application-related property rather than a general attribute like corrosion resistance. Therefore, the emphasis on corrosion resistance is what makes this answer correct, as it directly addresses the durability and lifespan of the conductor in challenging environments.