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 Q]: [header] How to teach your dog to speak [title] Choose your reward. [step] Pick something your dog really loves; the better the reward, the easier it will be to teach your dog. If your dog loves to play, you can try using her favorite toy and playing with her when she barks. <sep> (A) In some cases, you can train your dog to bark through verbal praise. [substeps] Figure out your dog's reward based on cultural context. (B) Point out what your dog likes to play with and put a look on the chart indicating what she wants to learn. [title] Tell your dog to " sit ". (C) Most people, however, will find that treats are the most effective way to teach a dog. The best treats will be ones your dog loves, and which are also easy to carry, easy to break into pieces, and healthy. (D) If her bark is off-putting, encourage her to try other tricks, to avoid barking. [substeps] If you provide a toy or two, this will be enough to train your dog to try the reward.
[EX A]: C

[EX Q]: [header] How to change trackpad settings on macbook pro [title] Find the system preferences. [step] Starting from your main desktop screen there are two ways to find the system preferences where the mouse and touchpad settings will be located : [title] Bring your cursor to the bottom screen and find the system preferences application. [step] The icon looks like a box with three gears inside it. <sep> (A) Open that to find all your system preferences. [substeps] Alternatively, you can use the spotlight feature. (B) On macbook pro this icon resembles a round blue square with a horizontal green dot on it. On other applications this icon is actually a box with a gear, and is small in appearance. (C) It can be located on the taskbar or in the upper left-hand corner of the window. [title] Let the system preferences application perform its work. (D) [title] Click the customize key in the dialog box. [title] Follow the on-screen instructions to change the customization function.
[EX A]: A

[EX Q]: [header] How to obtain traveler's checks [title] Set a travel budget. [step] You will need to determine how much on-hand currency your trip will require to ensure that you order the appropriate amount in traveler's checks. Consider daily expenses such as meals, transportation and tips as well as any additional planned purchases including souvenirs, sight-seeing tours and admission charges. <sep> (A) [substeps] Know your budget before selecting traveler's checks. Being ahead of schedule will save you significant time on where to get traveler's checks. (B) [title] Visit your local bank, credit union or other financial institution. [step] Many organizations will waive processing fees for their members. (C) [title] Determine some end-of-season expenses. [step] You may want to consider spending some time researching popular destinations as well as planning ahead in advance. (D) In addition, determine your funds due dates. [title] Do not forget to check the expiration date.
[EX A]:
B