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 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]: A woman cleans a cafeteria floor with a mop while occasionally talking to the camera. the woman <sep> (A) uses a mop on the floor under her chair and in a bucket. (B) uses the mop around the tables and some seating areas as well as around fork corners. (C) uses a mop nozzle to clean the floor. (D) walks to and cleans a different part of the cafeteria floor.
[A]: D

[Q]: [header] How to grow popcorn [title] Buy some fertile popcorn seeds. [step] You can use plain popcorn from a bag, but you will want to do a fertility test first. Not all store-bought popcorn will be fertile because of the heating and sterilization processes popcorn goes through before being packaged and sold. <sep> (A) [substeps] The glow this is used to depict the raw kernel kernels will emerge with the film creation process. Process can take between 4 and 6 months. (B) You can also buy popcorn seeds from a seed company or from a farmer. [substeps] To test store-bought popcorn for fertility: sow 20 seeds, water, and wait. (C) So the best thing to do is to buy the seeds that come with prepackaged popcorn for the best results. [substeps] Check the price of your popcorn to see if the seller offers a warranty regarding the quality of your popcorn. (D) In this case, buy some seeds from a store like santo's store. They contain an enzyme which activates prolactin, which your popcorn will absorb.
[A]:
B