A voltage-follower amplifier comes to you for service. You find the voltage gain to be 5.5 and the input impedance 22 k. The probable fault in this amplifier, if any, is

• A. the gain is too low for this type of amplifier.
• B. the input impedance is too high for this amplifier.
• C. nothing is wrong. The trouble must be somewhere else.
• D. none of these.