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 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 Output:
A


Ex Input:
A man and a woman run and exercise in a gym. The woman and the man talk in the gym and give advice if a person is cramped up. after <sep> (A) , the man goes in the house to grab a towel and a pair of gym pants and tie his shoe and join the woman and the man in gym. (B) , the man puts his arms up to jump at the gee gee and performs huge leaps. (C) , the man and woman talk in the courtroom. (D) , the woman and the man continue exercising.

Ex Output:
D


Ex Input:
[header] How to grow monkey grass from seed [title] Harvest seeds from monkey grass blossoms. [step] Using snippers, clip the blossom stems that hold the seeds in place. Then, dry the stems by hanging them in a room with good air circulation. <sep> (A) Once they're completely dry, pull the seeds from each stem by hand. [substeps] Your seeds will not keep for more than a couple weeks without losing their capacity to germinate, so don't harvest them until you're ready to use them. (B) Remove as much dirt as possible and create a barrier of straw or stones between the seeds. [substeps] Alternatively, make a small pile of the seeds and soil on the ground and mix in as much as you need. (C) [substeps] If the seed is larger, you may need to snip away the few seeds that still remain on the stem. [title] Select a site with healthy or heat-resistant plants. (D) [substeps] Monkey grass grows quickly, and generally takes longer than other types of grass. Because nectar spills up through the seeds, this method works well.

Ex Output:

A