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".

[header] How to calculate a light year [title] Define the light year. [step] A light year is a measure of distance equal to how far light travels in one earth year. Because distances across the universe are so large, astronomers use light years. <sep> (A) However, they can also be determined by dividing by a distance. [substeps] Some light years are used year-round. (B) For light year 2014, the main determiner is the sun. In the light year, the world is filled with light bulbs. (C) Without light years, discussing the distance between two stars would require the use of large, unruly numbers. [substeps] Another measure of distance you may come across when learning astronomy is the parsec. (D) [substeps] There are two kinds of light years: day and night. The two types of light years are known as night and day.
C

Afterwards the woman takes the shaped dough and places it on a tray next to the stove. in the end <sep> (A) the woman puts the cake in a cookie sheet and puts it in the oven. (B) she pours several ingredients into syrup and begins baking the cookies. (C) the woman takes the tray and places it in front of her, she than instructs the girl to sprinkle the cookies. (D) , she takes out a mixer and grans the dough into a large, thick square for baking.
C

[header] How to study the medical syndrome of hyperkalemia in humans [title] Study the electrolyte disturbance of k + in the body of humans. [step] This article discusses the electrolyte disturbance of k + ions that is called clinically hyperglycemia. This is one medical syndrome that is manifested by excessive amount of k + ions in the extracellular space between the cells of the body and in the blood plasma. <sep> (A) This excess of this ion in the body has many causes and is associated with distinct clinical symptoms. These clinical symptoms are the direct result of its physiological function in the body. (B) [title] Learn about the hyperkalemia of humans. [step] This type of hyperkalemia causes seizures, due to insulin loss due to excessive hyperglycemia in the cells. (C) This is referred to as the patient's " hypoglycemia syndrome. " [title] Learn about the causes of chronic hypoglycemia. (D) These ions are not necessary for the anatomy and function of the blood vessels. These ions are fed downward through the veins of the kidney.
A