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". 

[Q]: A person is seen riding around on roller blades and performing a grind on a bar. several more clips <sep> (A) are shown of the boy riding around on the equipment as well as sit on the floor and play pool. (B) are shown of people driving around on machines with one person riding in front. (C) are shown of the athletes performing tricks in various stretches as well as throwing a ball off into the distance. (D) are shown of the person performing grinds with roller blades as well as other flips and tricks.
[A]: D


[Q]: [header] How to lance and drain a blister [title] Assess the blister before choosing to drain it. [step] Not every blister needs to be lanced. In fact, some experts recommend that you should only drain blisters that are exceedingly painful, in weight-bearing or high-contact areas, or larger than 0.8 inches (2 centimeters) in diameter. <sep> (A) [substeps] If the blister is intact and manageable, try to keep it intact. Apply a piece of moleskin, adhesive felt, or tape. (B) In these instances, you need to check the blister to determine if it needs a leak-proof drain. [substeps] See the " how to drain a blister " section of this article for instructions. (C) [title] Make a decision whether or not to drain the blister. [step] If the blister is very painful, medical sterilization is an option. (D) [substeps] There is no one right way to do this, so you have to be sure that you have the right technique. It is not as easy to clean a blister as to rinse with water and applying a sterile dressing.
[A]: A


[Q]: [header] How to criticize constructively [title] Note the difference between constructive criticism and destructive criticism. [step] Constructive criticism improves a person's behavior, encouraging positive changes. Whereas destructive criticism condemns and discourages the person. <sep> (A) [substeps] Destructive criticism compares an individual to someone he or she might have been if he or she was different. Destructive criticism makes the individual more receptive to change. (B) Destructive critics treat individuals with a certain, refined outlook, which allows them to reinforce their emotions and express their own thinking positively. They typically state their thoughts, not the emotions behind them. (C) [substeps] Destructive criticism demeans, discredits and hurts people. In contrast, constructive criticism improves a specific behavior without personal attacks. (D) Consistent use of the word " improvement " is a distinction between passive and constructive criticism. [substeps] Passive criticism burns off more power with an objective, thinking-to-think assessment.
[A]:
C