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".

Example Input: [header] How to recognize chickenpox [title] Watch for symptoms on the skin. [step] Approximately one or two days after developing a runny nose and sneezing, you may see red spots on your skin. These dots often start on the chest, face, and back, are often itchy, and can quickly spread to the rest of the body. <sep> (A) [substeps] When this occurs, it may also be due to a new virus. If you experience any major allergic reactions to chickenpox, such as hives or rashes, contact the doctor. (B) If you suspect that you may have chickenpox, you can easily detect these signs and get medical care. [substeps] These red itchy spots may be small, crisp, or feel tight when you press them onto your skin. (C) [substeps] If you are experiencing a runny nose, you may also develop a flu or fever the following day after taking chickenpox. Syphilis, the " natural flu, " often shows up early in the infection, and even greater in children. (D) [substeps] These red spots will turn into red bumps and then small blisters (vesicles). These spots contain the virus and are highly contagious.
Example Output: D

Example Input: A man is seen shooting a bow and arrow followed by another man taking a bow and aiming. Another man is seen kneeling down before bows and speaking to the camera. he <sep> (A) clips a man on the arm and leads into a shirtless man releasing a arrow. (B) speaks more and pictures of him hitting the arrow in the bow while another draws closer with arrows. (C) points to various boxes and continues looking into the camera and speaking. (D) then approaches another man and starts shooting arrows down him.
Example Output: C

Example Input: [header] How to create a facebook icon using photoshop [title] Open a new document. [step] You can choose any settings as preferred. Press ok when everything is set. <sep> (A) [title] Open the' social' tab on the google photos window. [step] You'll find this panel on the bottom; click it to open a new account. (B) Be sure to set the color that matches your image : [substeps] Cool-keep the background brown and take a dark cover. Cool on the background, and the background transparency will shine through; you can probably do this in the editing tutorial pane. (C) Set the document to the following values : [substeps] Size : 500 x 500 resolution : 72 pixels/inch color mode: rgb color at 8 bit background contents: transparent [title] On tool options, select rounded rectangle tool. [title] Drag mouse on the editor pad to create a rounded rectangle image. (D) [title] Click on messages in the pop-up window. [step] You'll be presented with a list of available accounts.
Example Output:
C