Which statement about instrumentation amplifiers is true?

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Instrumentation amplifiers are designed to boost tiny differential signals coming from sensors while rejecting noise that affects both inputs equally. They provide very high input impedance so the sensor isn’t loaded and they offer excellent common-mode rejection, meaning interference common to both leads is largely canceled out before it reaches the rest of the circuitry. This combination makes them ideal for sensing applications like strain gauges, thermocouples, and biomedical sensors where the signal is small and buried in noise. The gain can be set precisely with external resistors, and the output is a clean amplified version of the difference between the two inputs.

The other functions mentioned aren’t what instrumentation amplifiers do: converting digital to analog is the job of a DAC, regulating supply voltage is the role of a regulator, and storing data is handled by memory or a data logger.