TASK DEFINITION: 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". 
PROBLEM: [header] How to clean sperrys [title] Remove caked-on dirt with a bristle brush. [step] Using a soft toothbrush or a bristle brush made for leather, gently brush away any dirt, dust, or debris. Brush the leather with soft strokes in the same direction. <sep> (A) [substeps] Brushing the pricier areas first helps to allow for better handling of all surfaces. [title] Dust the back and sides of the flaked-off parts with a lint-free cloth. (B) If you scrub the shoes in multiple directions, you're likely to leave scars. [substeps] Use a rubber-bristled brush rather than a nylon-bristled brush. (C) [substeps] When applying pressure, make sure to keep the bristles away from your sperrys' feathers. It helps to remove any stuck on insects. (D) [substeps] Sweep or wipe off any grime stuck to the surface. Dry the area with a soft cloth or a clean towel afterwards.

SOLUTION: B

PROBLEM: [header] How to choose a protein supplement [title] Choose whey protein to build muscle. [step] If you're looking for muscle-building protein, whey protein is generally your best option. Whey protein can come in the form of powder or pills and is commonly used when people are trying to build muscle via things like weight training programs. <sep> (A) By doing this, you're gaining more body fat and growing more muscle at the same time. [substeps] Whey protein can be found in half of the packaged foods. (B) Whey protein is also a low-fat protein, rich in red blood cells from bacteria. Although whey protein does not impart healthy fats to the body, whey protein helps build muscle, which you can grow and burn through exercise. (C) [substeps] Look for a whey protein powder or supplement with a high biological value. This measures how well your body can absorb the protein. (D) Whey protein occurs as a food chain, hence the slogan, " protein is fat free ". [substeps] Whey protein is complex and varies from patient to patient.

SOLUTION: C

PROBLEM: [header] How to recycle glass bottles [title] Recycle glass bottles that are clear, brown, and green. [step] Glass bottles come in a variety of colors, from clear to brown to green. Clear bottles are used the most and are made of sand, soda ash, and limestone. <sep> (A) Brown and green glass bottles are usually used for drinks like wine and beer. Clear, brown, and green glass bottles can all be recycled. (B) [substeps] Be wary about putting clear plastic cans or glasses in the recycling pile. This is how plastic is collected and recycled. (C) Green bottles come in different finishes, including paint and enamel, and are full of dirt. The sand is a brown, long, and sticky material that creates the most acidity in the glass, so glass bottles should be recycled with paint or other material that can handle it. (D) Rain, ice, or heat can also affect glass bottles' surface quality. [substeps] You can recycle glass bottles by passing the glass bottle's case to a local recycling company that will collect them for you.

SOLUTION:
A