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 reduce fat in your cooking [title] Use broth in place of butter or oil in dishes like mashed potatoes, stir-fry or meat marinades. [title] Substitute applesauce or pureed prunes for butter or oil in baked goods such as cakes, cookies and pastries. [step] Use the same amount called for in the recipe. <sep> (A) Keep in mind your needs vary from recipe to recipe. [title] Try to reduce the number of butter or oil you add into your recipe. (B) [title] Replace cream in recipes with plain yogurt. [step] Yogurt can also be used in place of sour cream on a baked potato or in mexican dishes. (C) Too much fat may cause your cookies and pastries to cook unevenly and cause a hollow cavity or gap in the crust. [substeps] For example, use a bit of ground turkey instead of water in a pasta saute pan. (D) [title] Moisturize your skin when cooking. [step] Peeling and flaking your skin is an easy way to boost your immune system.
B

[header] How to change a drill bit [title] Loosen the chuck. [step] The chuck is piece on the end of the drill that loosens and tightens to hold the bit. Grasp the chuck with one hand while you hold the handle of the drill with your other hand. <sep> (A) Loosen the chuck by sliding the drill bit along one side. If you have known it already, it will already be loose, but there is a screw on the end of the piece that holds the bit in place. (B) Use extra leverage as you slowly press down on the chuck to loosen it. [substeps] Keep your eye on the chuck while you are tightening it. (C) Twist the chuck counterclockwise to loosen it. Another option is to pull the trigger gently while holding the chuck. (D) Begin to tighten the chuck by turning it clockwise so that the chuck remains firmly in place. Use your wooden allen or long-handled allen key to turn the chuck clockwise until it is firmly within the drill's circle.
C

[header] How to take a horse's vital signs [title] Use a thermometer. [step] Lubricate the tip with petroleum jelly or vaseline. [title] Move the horse's tail to the side, so that it is out the way. <sep> (A) [title] Put the thermometer tip on the horse's backbone (the thickest part, usually your horse's neck). [title] Slide the thermometer gently into the horse's mouth. (B) [title] Hold the lead at the nape of the neck with both hands and look for signs of weakness, tenderness, sudden discomfort, etc. [step] Release the lead and stop moving a few feet away from the horse. (C) [step] You want to make sure the thermometer is inserted carefully and closely. The thermometer should be able to see the internal temperature of the blood and not just the body temperature. (D) [step] Insert the thermometer into the horse's rectum, angled slightly towards the ground. [title] Leave the thermometer in position for at least three minutes or until it beeps.
D