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 make silver nitrate [title] Wear proper protective equipment. [step] The chemicals necessary for this process are highly toxic and can lead to injury if not handled properly. Eye protection, gloves, and a lab coat are necessary to remain safe. <sep> (A) You should also wear long, loose sleeves or long pants to protect yourself from these hazardous chemicals. Be sure you wear good quality work clothes. (B) Long pants and closed-toe shoes, preferably without mesh, should be worn to protect against floor spills. [substeps] Eye protection should completely cover your eyes and the sides of your eyes to protect from splashes. (C) Your lab coat can protect your skin and prevent pollution while working. Ask your local hazardous waste management company to provide you with an appropriate safety gear. (D) Wear full, protective safety gear as well to get the job done effectively. [title] Choose a location for your lab lab.
Example Output: B

Example Input: [header] How to survive flight attendant training [title] Pack enough of all the essentials you will need to make it through an extended trip while maintaining a professional appearance. [substeps] Unless otherwise specified in your correspondence from the airline, bring business attire for classroom and training sessions. Bring business-casual attire for down time. <sep> (A) This includes a sweater, gloves, sensible footwear for long car rides, and a carry-on book for your reading habits. First, bring jackets, pants and boots. (B) Some airlines may provide you with a uniform during training, so you won't need to pack as many of your own clothes. Bring anything that will help you have more comfortable and restful sleep, like an eye mask, your own pillow and calming music. (C) Even a range of items such as a fishing belt and sneakers are most effective during this time period. If you know your plane has a get-together with close friends and family, bring along some casual clothes to dress up for your flight. (D) Don't pack clothes that are too formal, too casual, too old-school. The point of switching schools is to have a better idea of what you need to wear.
Example Output: B

Example Input: [header] How to keep a betta fish alive for 4 years [title] Choose your betta carefully. [step] Try supporting local businesses that take good care of their fish instead of big chain pet stores. Local pet store and online bettas usually have better genetics than the ones that come from the fish farms that supply pet store chains. <sep> (A) Genes play a large role in betta health. Young bettas are brightly colored and have long, flowing tails; as they get older, their colors dull. (B) If you live in the area, you could offer to help with some of the same but smaller purchases. If you can, find a place near you where you can get fish in your own home. (C) Instead, buy a popular, high quality freshwater fish. Large chain pet stores, like croatocross and craigslist, will generally have the best options. (D) [substeps] Do not buy betta fish that stay around larger chains, such as chain fish farms or buyers from towns like this. This is especially important if your shop is near an airport.
Example Output:
A