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 woman cleans a cafeteria floor with a mop while occasionally talking to the camera. the woman <sep> (A) uses a mop on the floor under her chair and in a bucket. (B) uses the mop around the tables and some seating areas as well as around fork corners. (C) uses a mop nozzle to clean the floor. (D) walks to and cleans a different part of the cafeteria floor.

Ex Output:
D


Ex Input:
[header] How to relax and go to sleep [title] Exercise during the day. [step] This will help you to be physically tired at night. Your body will also release endorphins which will calm you emotionally. <sep> (A) The endorphins can also help maintain your mood because they help decrease your emotional stress and improve your energy level. [substeps] There are numerous foods and types of exercise to help you to feel relaxed throughout the day. (B) [substeps] Exercise can also wake your body up, so it is best to do it earlier in the day. If you can chose between going to the gym in the morning and in the evening, try going in the morning. (C) Exercise gives you the endorphins, which are giving your body the energy to work and go to sleep. [substeps] Thirty minutes of exercise a day is probably best, but you can even do more if you want. (D) Try walking, cycling, swimming, boxing, jogging, or dancing. Any activity that relaxes you will help you feel rested at night.

Ex Output:

B