Answer:
c-Either A or B
Step-by-step explanation:
The non-inverting amplifier usually has the input voltage connected to the non-inverting input while the inverting input is connected to the output.
Both the unit gain amplifier and the voltage follower have an input voltage connected to the non-inverting input, and the inverting input connected to the output, so both are special cases of the non-inverting amplifier.
The correct answer is
c-Either A or B