An op-amp has a differential gain of \(\rm 10^3\) and a CMRR of \(\rm 100 \ dB\). The output voltage of the amp with inputs of \(\rm 120\ μV\) and \(\rm 80\ μV\) will the

• A. \(\rm 26\ mV\)
• B. \(\rm 40\ mV\)
• C. \(\rm 100\ mV\)
• D. \(\rm 200\ mV\)