In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

Ex Input:
[header] How to buy penny stocks without a broker [title] Be aware of the benefits of purchasing penny stocks. [step] Because penny shares can be purchased so cheaply, they represent an opportunity for enormous gains through high-volume purchases. [title] Be aware of the downside, too. <sep> (A) [step] Penny stocks are not very liquid, meaning there may not be much demand for them, and as a stockholder, you could have trouble finding a buyer, should you want to sell your shares. In addition, the issuers of cheap stock may suffer from a weak market position and a fragile financial profile, making them risky investments. (B) [step] The penny company's corporate board (rtc) typically has very little reasonable interest in the penny stocks, and some people expect to earn between 40 and 65 percent. It can be all or most of these savings, and some people worry about them not being valued enough for business purposes. (C) [step] Penny stocks are either volatile, gaining the first recession, or being sold to a higher yield. To understand what risks penny stocks can pose for those returns, you should look at the non-penny banks. (D) [step] Penny stocks offer many advantages for the public when buying a stock. These advantages can include substantial advancements in commission rates, larger returns, and cash reduction.

Ex Output:
A

Ex Input:
A grey african parrot walks up to a coffee mug filled with coffee. He takes a drink, then walks away. he <sep> (A) turns around and begins drinking from a different mug. (B) returns and grabs a second cup. (C) comes back and grabs the mug. (D) stares down at the coffee mug.

Ex Output:
A

Ex Input:
[header] How to test resistors [title] Remove power from the circuit containing the resistor. [step] This can be done by unplugging it from the mains or by removing the batteries if it is a portable device. Keep in mind that some devices still can be charged with a potentially harmful voltage until minutes after removing its power! [title] Isolate the resistor from the circuit. <sep> (A) [step] Refer to the instructions that came with your small electronic device. Select the power mark and remove power from the circuit. (B) [step] An attempt to measure a resistor that is still connected to the circuit can yield an incorrect calculation, as part of the circuit might also be measured. [substeps] Disconnect one end of the resistor from the circuit. (C) [step] This can take a while, depending on what you're plugging it into. Look on the side of the circuit board. (D) [step] Run a wire cutter or other tool over a resistor and then pull it away from the circuit using the tip of a screwdriver to remove the resistor. These don't have a wire cutter for this.

Ex Output:
B