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". 

A view is seen of the outside of an airport, then the wing of the flying plane. A man is on the plane wearing a mask. several people <sep> (A) are sleeping in the dark quarters. (B) fly by on a road inside the plane. (C) are shown flying the aircraft, while shooting at a large target at one point. (D) speak, then they all fly kites on the plane while people walk by.
A

[header] How to make black coffee [title] Purchase freshly roasted, whole bean coffee. [step] If you can't purchase it directly from the roaster within a week or so of it being roasted, opt for a vacuum-sealed bag from a reputable national coffee-bean roaster. [title] Purchase your own coffee grinder, or grind it in the store. <sep> (A) [step] If possible, choose a burr grinder in place of a normal blade grinder. For best results, grind the coffee fresh right before brewing each day. (B) [step] Grind coffee beans in the near-black zone of a coffee grinder. You can use either a regular-size grinder or a pre-grind grinder to grind your coffee. (C) [step] Modern coffee grinders have drawbacks, as they require higher temperatures to make purified coffee. Where possible, purchase one that comes pre-boil. (D) [step] Print it onto a piece of paper, remove the lid from the coffee grinder, and grind the coffee beans in the machine's center. [title] Unplug the coffee grinder and plug it into the wall outlet.
A

[header] How to roll sod [title] Rent or purchase a lawn roller from a home supply store. [step] You can rent lawn rollers by the hour, day, or week. They cost about $18 (£ 12) a day or $72 (£ 51) a week. <sep> (A) Each brand of lawn roller fits onto two kinds of carpet. A good choice is a linoleum, hardwood, or vinyl carpet. (B) If you're planning on mowing your lawn, you'll need a pair of lawn roller. Make sure the product is compatible with your existing lawn roller to avoid overclocking your lawn. (C) These rollers are called cushions and have the benefit of being flat and easy to roll. [substeps] Consider checking out sites like ebay or elsewhere for your lawn roller rental website, though most will offer free rolls. (D) Residential law rollers range from about 24-36 inches (610-910 mm) wide, which works well for home landscaping projects. [substeps] If you are completing many landscaping projects, it may be more cost-effective to purchase your own.

D