What does Old House Wiring often lack?

Old house wiring frequently lacks both ground connections and modern circuit breakers, making option C the correct choice.

Ground connections are critical for electrical safety since they help prevent electric shock and protect against electrical fires by providing a safe pathway for excess electricity to dissipate into the ground. Many older homes were built before grounding systems were widely required in electrical codes, meaning their electrical systems may not have this essential safety feature.

Modern circuit breakers have also evolved significantly to enhance safety and functionality in electrical systems. Older homes often still use fuses or outdated circuit breaker systems that do not incorporate features like GFCI (Ground Fault Circuit Interrupter) or AFCI (Arc Fault Circuit Interrupter), both of which are designed to prevent specific electrical hazards.

Therefore, the correct answer highlights that old house wiring typically lacks these critical safety components, which are necessary for compliance with current electrical standards and practices.