What would be the output voltage in a circuit given combined DC input voltages of -5.5 V?

In a circuit where the input voltage is given as -5.5 V, this value represents the voltage level at the input terminals. If there are no additional components in the circuit that would drop or change this voltage—such as resistors, diodes, or other elements affecting the voltage level—the output voltage will equal the input voltage.

Thus, if the circuit simply relays the input voltage without any modification or load that would alter it, the output voltage will remain at -5.5 V. This makes -5.5 V the correct output voltage.

Other options represent voltages that would require some active adjustment or modification in the circuit, which is not indicated by the question. Therefore, the only choice that accurately reflects the output voltage given the stated input is -5.5 V.