The correct answer is A) The two thermocouples would be wired in series-opposing to measure the difference between the two temperatures. When using two thermocouples to measure a temperature difference, the series-opposing wiring technique is the correct approach. In this configuration, the thermocouples are connected in series, but with their polarities reversed. This allows the voltage outputs of the two thermocouples to oppose each other, resulting in a voltage difference that is proportional to the temperature difference between the two measurement locations. The other options are incorrect because: B) wiring the thermocouples in parallel would not provide a temperature difference measurement, C) wiring them in series-aiding would simply add the voltage outputs, not measure the difference, and D) it is indeed possible to measure a temperature difference using two thermocouples with the proper series-opposing wiring.