If All Four Input Resistors to a Summing Amplifier Are $\mathrm { k } \Omega$

Multiple Choice

If all four input resistors to a summing amplifier are 2.2 $\mathrm { k } \Omega$ , the feedback resistor is 2.2 $\mathrm { k } \Omega$ and all four input voltages are -2 V , the output voltage equals_______

A) 2 V
B) 2.2 V
C) 8 V
D) 10 V