Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?

• A. The device parasitic capacitances behave like open circuits, whereas coupling and bypass capacitances behave like short circuits.
• B. The device parasitic capacitances, coupling capacitances and bypass capacitances behave like open circuits.
• C. The device parasitic capacitances, coupling capacitances and bypass capacitances behave like short circuits.
• D. The device parasitic capacitances behave like short circuits, whereas coupling and bypass capacitances behave like open circuits.