Which of the following could indicate that the circuit is malfunctioning?

Higher than expected voltage can indicate a malfunctioning circuit because it suggests that the electrical conditions surpass the normal operational levels for that specific circuit. In typical scenarios, circuits are designed to operate within a specified voltage range. If the voltage is higher than expected, it could point to issues such as improper regulation, failing components, or potential problems in the supply line that could lead to equipment damage or safety hazards.

While consistent meter readings could signify stable operation, they do not indicate malfunction. Low current readings may also reflect a range of operational conditions, positive or negative, depending on the design and load of the circuit. Intermittent resistance typically suggests fluctuations, which could be symptomatic of a fault, but the higher than expected voltage is a clear and direct indicator of potential circuit malfunction that warrants immediate attention.