Given the task definition and input, reply with output. 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 change a water filter in a kenmore refrigerator [title] Locate the manufacturer of the kenmore refrigerator, to find the model part number. [step] You can find this in the refrigerator manual, or by doing some online research. [title] Order your part online or by calling the number in the manual that is recommended for kenmore replacement filters. <sep> (A) [step] A number of water filtration brands, like pur and brita may be available to you. [title] Take the filter out of the box, and remove the caps on the end of the filter. (B) [title] Call the company to purchase the new unit. [step] A technician or customer service representative at the store should be able to tell you which unit to purchase. (C) [step] This is usually located above the top 1/10 cap. [substeps] After ordering, set your ambient temperature to 50 f (7 c). (D) [step] There are some recent reports of a company who uses a three lot system to manufacture weekly parts. The chart below shows information on manufacturer used and distance from the same lot.
A