Question

in the common mode,
select one:
a. the outputs are connected together
b. the output signals are in - phase
c. an identical signal appears on both inputs
d. both inputs are grounded

Explanation:

Common mode operation for amplifiers is defined by applying the same (identical) signal to both input terminals. Options a, b, and d do not match the standard definition of common mode.

Answer:

c. an identical signal appears on both inputs