instruction:
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". 
question:
There's an artist painting a square canvas board with several acrylic colors using a flat brush in a studio. she <sep> (A) is painting a christmas tree with a piece of acrylic text. (B) moves the brush across the screen several times. (C) shows how to cut the paint with the flat brush when time stops. (D) begins by painting blue strokes with the flat brush on the canvas surface.
answer:
D


question:
[header] How to tell the difference between different types of plant fertilizers [title] Use soluble fertilizer when you want to water in the fertilizer. [step] This fertilizer is usually added to the watering can. [substeps] This is best for helping boost growth when its growing season and for frequently fed container plants. <sep> (A) In the summer break, try adding two or three inches of food to fill the watering can-too much fertilizer will kick in when the corn is thirsty, too little will only keep it growing. Plan it out in a bucket or basin for easy irrigation. (B) [title] Use a hose to water a potted plant after planting. [step] Water a cactus when they get too hot for watering. (C) Leaves that don't bond and stink up the water are also large fertilizer that needs to be added to your watering can. [title] Use different types of fertilizer. (D) [title] Use granular fertilizer when you need to supply a concentrated amount of nutrients. [step] A plant may be lacking in a particular nutrient (this will be evident through such things as yellow leaves, , etc.
answer:
D


question:
[header] How to buy a ceiling fan [title] Measure the length and width of the room. [step] Before you go ahead and buy your new ceiling fan, there are a number of factors and variables that you need to take into account. The first of these is the size of the room you are buying the fan for. <sep> (A) The size of the room a fan fits comfortably in. [substeps] Take the height and width of the room into account. (B) [substeps] Ideally, the ceiling fan should be at least as wide as the room's ceiling area. However, in large rooms, it can be as wide as the space between the ceiling opening and the wall of the room. (C) Calculate these by weighing the ceiling fan at a traditional estimate of its height and width. [substeps] Btus is the height of the ceiling fan's widest edge (known as the flat edge). (D) To make sure that the fan works effectively you need to ensure that it is big enough for the space. [substeps] Get hold of a tape measure and determine the length and width of the room.
answer:

D