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". 

[Q]: [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.
[A]: B


[Q]: [header] How to buy a light kit for photography [title] Make a list of required and/or desired criteria for your light kit. [step] These features include whether you want lights arranged on the floor or ceiling, what kind of photography you will be doing, how many lights you will need, etc. [substeps] Floor studio lights and backgrounds can be transported and arranged on stands or supports. <sep> (A) You may want several different lighting items in one kit. There are many available but most of the light hardware items, like dimmer switches and binders or small set of battery-powered lights, should be picked up at a craft store. (B) Pointed, straight, or one-sided lights can be divided into categories and arranged on tables or on poles. [title] Purchase fixtures that fit the gender and the type of lighting and coloring range that you want to consider. (C) Ceiling lights are more expensive and must be on a rail system for positioning in a rectangular area while background rollers are mounted on the ceiling. Your type of photography can determine how much light you need. (D) Frame sizes can be adjusted to your personal preference depending on the size of your studio. Don't forget to read the product description as well.
[A]: C


[Q]: [header] How to drill holes on an engine lathe using the carriage [title] Attach the chuck to the lathe according to the manufacturer's instructions. [title] Loosen off the chuck, mount your work into the chuck and then re-tighten the chuck. [title] Select your tooling and speeds and feeds. <sep> (A) [title] Put the base bush on with the cleat you have selected. [title] Drill out small ball holes into the cleat, at various lengths. (B) [title] Mount a lathe center in the tailstock. [title] Place the drill with the square split bushing into the tool post and shim or adjust to ensure that the drill center lines up with the lathe center. (C) [title] Set the grinder's range appropriately. [title] Use the drill, paddle head and steel grinders to till the cut marks are spotless and clean. (D) [title] At the high end, drive the chuck until the engine spool and hose combine and the grill heat needs to reach the pan. [title] Remove the lens and screw it back in using the outer snap plate.
[A]:
B