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". 

Input: Consider Input: [header] How to buy a wood burning stove [title] Consider your heating needs by evaluating the size of your home. [step] You will need to determine the heat load necessary to maintain the square footage of the area you want heated. Heat load is measured in btus, or british thermal units. <sep> (A) Inquire about btus and thermal units using online resources. [substeps] Btus heat packs can be found at home improvement stores, department stores, and some gas stations. (B) To determine how much heat you need, pay attention to the dimensions of each room you intend to fire in. [substeps] The larger the square footage, the larger your fire seats will need to be. (C) You will need 25 to 30 btus per square foot. [substeps] Measure each room to be heated with measuring tape. (D) Btus are rated from 2000-1000. Btus can be changed or altered depending on the size of your home.

Output: C


Input: Consider Input: A man is talking while holding a toothbrush in his mouth and starts to brush his teeth. The man continues to brush his teeth while talking some as well. the man <sep> (A) then touches his head and fingers it as well as his face. (B) has a spray bottle and sprays it onto his teeth and he's back to brushing his teeth as well. (C) grins with paste in his mouth and continues to brush his teeth. (D) spits his mouth out into the sink which continues to make him embarrassed and has him grab his toothbrush.

Output: C


Input: Consider Input: [header] How to calculate your grade [title] Determine if you are on a point system. [step] Before calculating your grade, you will need to figure out if your teacher is using a point system or a weighted grade system. With a point system, everything you do in the class will be worth a certain number of points. <sep> (A) Look for a point score on your assignments or simply ask your teacher to determine if this is how you are being graded. [title] Determine the total number of earned points. (B) Factors such as what is required in lesson plans, marks on test instructions, or key assignments are factors that make a grade more desirable. [title] Find out if your teacher is using a weight scale. (C) [substeps] Assuming this is your grade, calculate how many points you have. Most students won't earn points above 3.5 points. (D) Try to stick to this list when you are studying, so when you come home from school, you will not be frustrated with yourself. [title] Find out if any students agree with the point system or a weighted grade system.


Output: A