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 reduce unnecessary antibiotic use [title] Be more patient with your illness. [step] As a patient, it can be hard to have an illness that's causing uncomfortable symptoms and lots of distress; however, many respiratory and intestinal infections clear up within a few weeks and are not life threatening. As such, take the time to assess your symptoms before visiting the doctor. <sep> (A) This can help avoid unnecessary antibiotic use. [substeps] The rule of thumb is to allow symptoms like mild fever, congestion, running nose and/or cough to run their course, usually about seven to 10 days. (B) That way, and possibly minimize all complications. [title] Be proactive about completing your medical check-ups. (C) [substeps] For instance, your doctor may ask for certain vaccinations and vaccines. You may want to call your healthcare provider to confirm the vaccine has been given and how well the bacteria is working. (D) [substeps] Watch for signs of illness that reoccur after you stop taking prescribed medication. Conditions such as repeated inhalation of a foreign substance can result in chest pain.
Example Output: A

Example Input: A pot of water boils on a stove. A person shows us a package of spaghetti then adds the spaghetti to the boiling water. the man <sep> (A) places the spaghetti into a pot of water. (B) stirs the spaghetti in the pot. (C) adds more spaghetti until the cooked spaghetti is finished. (D) boils spaghetti onto a plate and sets the plate aside.
Example Output: B

Example Input: [header] How to use light therapy to sleep better [title] Talk to your physician about light therapy. [step] Many people experience sleep problems and it's important to contact your doctor if you are having trouble sleeping. Your doctor can rule out other possible causes of your insomnia. <sep> (A) Your doctor may be able to recommend the best medical treatment for you. [substeps] When you don't feel like you are sleeping, you may have a sleep anxiety disorder, which can cause sleep problems. (B) If your doctor isn't familiar with light therapy, ask for a referral to a sleep specialist. A medical professional can help you come up with a plan to treat your insomnia using light therapy. (C) Ask your doctor questions including : [substeps] Has it happened before? How often do i sleep? I've been experiencing light therapy for a long time without managing the situation or reacting to the blackout. Has there been changes in my sleep or how does light and dark play a role in my sleep? Am i taking medications? [title] Try sleeping aids. (D) With a successful light therapy regimen, you may be able to fall asleep by 10 am or even earlier. [substeps] Your doctor may also be able to suggest how to adjust your schedule.
Example Output:
B