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 make healthy mashed potatoes [title] Wash and cut the potatoes. [step] Wash 1 1/4 pounds (567 g) of your potatoes. You can also use a mix of potatoes and root vegetables for a variety of nutrients. <sep> (A) You can discard the peels, pits, and skins to make only healthy mashed potatoes. [substeps] The mashed potatoes will have a mildly sour texture after this step. (B) Leave the skin on the vegetables and cut them into 1-inch (2.5 cm) pieces. [substeps] Ensure that the pieces are the same size, so they cook evenly. (C) Wash the potatoes out of a colander and rinse them under clean running water. Then rinse each potato under cool, running water for about 5 seconds to remove dirt. (D) Wash the potatoes under hot tap water so they're soft and ready to eat. [substeps] Fresh or frozen mashed potatoes will last 7 to 10 months.

SOLUTION: B

PROBLEM: [header] How to download microsoft office 2010 [title] Visit the office 2010 download page. [step] Microsoft office can be legally downloaded from microsoft's website as long as you have a valid 25-character product key. To find it easily, search for " using your office 2010 product key ". <sep> (A) [substeps] If you don't have a csso account, you may have to create one. You will need to verify your identity with microsoft office 2010. (B) [substeps] Office 2010 is no longer available for purchase or as a trial from microsoft. You can still buy boxed copies from other retailers. (C) [substeps] Leave one or more lines between the tabs on the homepage and the window you will be downloading to provide information about what you want to download. [title] Open the primary file you wish to download. (D) [title] Enter the windows code to install microsoft office 2010. [title] Click on the save file to run the pc then re-open microsoft office 2010 now to continue.

SOLUTION: B

PROBLEM: [header] How to make a natural dog flea massage oil [title] Check the ingredients list below and go shopping. [step] Health food stores are most likely your best source for the ingredients. [title] Place the sunflower oil into a glass or ceramic bowl (metallic bowls may react with some of the ingredients). <sep> (A) [title] Add all the essential oils and blend well. [step] It's that easy-now you have the massage oil. (B) [step] Hold it under running water for at least 30 seconds. [title] Add the oats, sunflower seeds, tapioca and cinnamon sugar. (C) [step] Alternatively, you can use a sturdy, glass jar. [title] Stir the oil until it thickens. (D) [step] Mix the ingredients around with the spoon; the mixture will remain richer than the other ingredients, and thus is less likely to run. [title] Add the oregano, peppermint leaves and crushed sage seeds to the oil.

SOLUTION:
A