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".

[EX Q]: A woman stands behind a bar and talks to the camera. The woman then takes a glass an puts it on the bar. the woman <sep> (A) screws a cocktail shaker onto a lemon wedge and pressing the lemon wedge back and forth. (B) begins making a cocktail. (C) takes a bucket and turns it upside down. (D) then pours liquid into the glass with ice after.
[EX A]: B

[EX Q]: [header] How to get oil out of hair [title] Shampoo your hair several times. [step] Use your regular shampoo to wash your hair in the shower. Really work the shampoo into your scalp using your fingers and rinse it out thoroughly with lukewarm water. <sep> (A) Rinse your hair as soon as possible after it is done, as prolonged washing can hurt the scalp. [title] Dry your hair as soon as possible. (B) Have a good conditioner available on hand for long-term use. [substeps] Because oil can build up if you're not getting it regular, don't rinse it out very often, as this may clog or unbalance the hair follicles. (C) Repeat the process one or two more times, as needed. [substeps] After you finish shampooing, add some conditioner to your hair and let it sit for 5 minutes before rinsing out. (D) [substeps] You can use a hairdryer, a microfiber cloth, or a shower cap to gently detangle your hair to avoid spreading the oil or holding your hair in. [title] Squeeze a dime-sized amount of shampoo from a bottle.
[EX A]: C

[EX Q]: [header] How to do research [title] Determine a good reason why this research needs to be done. [step] Clarify who it will help. The answer may be based on your academic, personal or professional needs, but it should be your motivation for doing a thorough job. <sep> (A) [substeps] Someone who finds your work to be fascinating will often work out a plan with you as a test partner. Workplace research should not be something you take lightly and be able to stand by. (B) [substeps] To determine whether a research effort is worthwhile, consider how successful your research is, how in-depth or if your research has an impact on the work that must be done in the future. Try to choose the person who will be doing the work that helps you achieve your goals. (C) [title] Define the problem or question at hand. [step] You should boil the question down to basic terms, time periods and disciplines. (D) [substeps] State whether you are engaged in this research. Any related sources will probably benefit or hinder your research.
[EX A]:
C