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 install a bakflip hd tonneau cover on a ford f150 [title] Place the rail of the bakflip hd on right hand side bed rail of the f150. [step] Slide the tonneau rail all the way forward to the bulk head. It is a good idea to have a squeeze clamp or similar to hold it in place. <sep> (A) [title] Slowly turn the bakflip over so it moves slowly, its going to wobble and have to be bent the opposite way of the rail. [step] Be prepared for a lot of bumping. (B) [title] Tightly wrap round tray socket on right hand rail over cover and fasten. [step] Compression disks complete a swivel mounted over rail. (C) [title] Place the included rail clamps in place. [step] Tighten with a wrench or socket. (D) This will prevent the oil from jumping up and down accidentally while the g2 is being painted. [title] Place the nikon bolt assembly inside the couplers cradle.

SOLUTION: C

PROBLEM: [header] How to make scented rocks [title] Purchase supplies from a local department store or craft store. [step] You will need plain flour, salt, food coloring and essential oils. Essential oils are oils that have been extracted from various plants. <sep> (A) You do not need to use all different oils, but big quantities will work. [substeps] Choose oils that you associate with fresh fruits and vegetables and herbs. (B) It can be easily purchased at craft supply stores or you may be able to find them online. Get an essential oil primer, then make sure your acrylic rock is thoroughly coated. (C) You can also purchase essential oils from craft stores, or you can order a variety of essential oils online. [title] Mix together 1/2 cup (118 ml) of plain flour and 1/2 cup (118 ml) of salt in a mixing bowl. (D) You will need and obtain the following materials : [substeps] A 40 oz mixing bowl large enough to fit the stones. If you do not have these materials to gather, a mixing machine at an arts and crafts store can be more economical than a large ceramic mixing bowl, which will require little or no space.

SOLUTION: C

PROBLEM: [header] How to test essential oils for purity [title] Compare the prices of the essential oils. [step] Some flowers or plants that essential oils are derived from require a larger quantity to create one drop of oil. For roses, it takes almost 60 roses to make one drop of oil, and this should be reflected in the price of the oil. <sep> (A) An unusually low price is normally a sign that the oil is diluted in some way, making it less pure. [substeps] If all of the oils from a particular brand are the same price, it is usually indicative of less pure oils. (B) It's important to note that different oils can come in different price ranges for the most potency. For perfume, you may only need a few drops. (C) [title] Examine the types of oils you want to find out about. [step] When purchasing a cultivar of oil, you might want to buy a bottle of different tones to see the cheapest options available. (D) [title] Take your oil through a test kit or agar-ware. [step] Agar-ware is available at major floral or specialty grocery stores, or through heavy duty cleaners.

SOLUTION:
A