The ac input resistance (Rin) of a voltage-divider biased common-emitter amplifier consists of ____________.

• A. <img src="/_files/images/basic-electronics/basics/fba17_1004a1.gif" alt="fba17_1004a1.gif">
• B. <img src="/_files/images/basic-electronics/basics/fba17_1004b1.gif" alt="fba17_1004b1.gif">
• C. <img src="/_files/images/basic-electronics/basics/fba17_1004c1.gif" alt="fba17_1004c1.gif">
• D. <img src="/_files/images/basic-electronics/basics/fba17_1004d1.gif" alt="fba17_1004d1.gif">