Teacher: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".
Teacher: Now, understand the problem? Solve this instance: [header] How to decorate with alien cocoons for halloween [title] Create a backdrop for your lair, unless your walls look creepy enough to show through. [step] Lay out a roll of dark paper or fabric large enough to cover your space, and spray paint them to add dimension and give them the color you want. [title] Cut and hang the backdrop. <sep> (A) [step] This is like wallpapering, only not as precise or sturdy. Measure the height of your walls and cut sheets three or four inches longer off your prepared paper or cloth. (B) [step] Use clear, stretchy hanging string and needle-nose pliers to fasten the hanging string where you want it to end. [title] Cover each space in the modular puzzle unit with duct tape. (C) [step] Cut out long pieces of black paper, like cardboard, and glue them to the sides of your domed ceiling to look like planets. [substeps] Alternatively, you can paint the ceiling with white paint and glue it on with a super hot glue gun and laser paint. (D) [step] Tape them in a style of your choosing, and if you want a more realistic look, take the tape off before you secure them with a button or ribbon. [title] Set the scene with a magic halogen light to make your room glow.
Student:
A