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". 

[header] How to introduce a pleco to a goldfish tank [title] Ask how large the pleco will grow to be. [step] Although most pet stores will sell plecos that are only a few inches in length, you should know that they can grow quite large. Fully grown plecos can reach up to two feet in length. <sep> (A) [title] Check your tank's surface before you place the pleco into the tank. [step] Make sure that your aquarium is opaque or has a drop-down tray so that your pleco is not exposed to water. (B) This can have a negative impact on their lifespan. [title] Choose a tank with large walls and no air holes. (C) [title] Make sure you cover more than twice the tank. [step] If you find that your pleco grows too much, cover the entire tank with a blanket. (D) The exact size of the pleco will vary depending on the species. Ask someone at the pet store how large the pleco will get before making a purchase.
D

[header] How to attract deer [title] Check local laws before establishing a feeding area. [step] In many states, feeding deer at certain times of the year is illegal and is discouraged. Deer that are fed may become nuisances to people. <sep> (A) [substeps] Check the local laws in your state before you start setting up a feeding area. You can look up laws in your area by visiting the state's hunting and/or grassland authorities website. (B) [title] Make sure that you locate your food plot away from roadways. [step] Deer might not come close if there is a lot of traffic nearby, and luring deer into the path of traffic can have serious consequences. (C) This could cause problems with highway safety, private park privacy, or other amenities you have at your local livestock shelter. If necessary, research the regulations in your area before making any kind of split-second decision. (D) Upon obtaining permission, you may get permission to feed a deer in your community. [substeps] The designated feeding time for deer is 8:00 am , 2:00 pm, or 10:00 pm.
B

[header] How to case a window [title] Remove any existing trim. [step] If you're redoing a window that already has trim installed, you'll need to get rid of the old before you can put in the new. Use a utility knife to score the caulk lines around the edges of the window trim, including the top piece, sill, and apron. <sep> (A) Coat all the exposed sides of the trim with caulk. [substeps] If possible, take the trim to your local hardware store to have it shaved off, rather than having it hidden behind plastic trim. (B) Stop at the bottom of the window trim, which is usually just slightly below the edge of the glass surface. Test the trim by cutting straight across and then gently pulling back on your knife or toothpick to reinstall it. (C) [title] Get rid of the trim with duct tape. [step] Start with the caulk lines closest to the window. (D) Then, pry up the old casing with a crowbar or the claw end of a hammer. [substeps] Cut and pry carefully to avoid damaging the window jambs or any part of the surrounding wall.

D