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]: [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.
[EX A]: C

[EX Q]: [header] How to avoid water retention [title] Have a healthy diet. [step] Ensuring you have a healthy, balanced diet is a good first step to avoid water retention. Water retention can occur due to imbalances in your diet, deficiencies of some vitamins and minerals, and having too much salt. <sep> (A) One study found that people with excess salt = no water retention. " imbalance " can add up as a reason for water retention and include making it much more difficult to stay hydrated. (B) Excess salt raises your blood pressure, resulting in inaccurate results. Look for foods that are low in salt and low in water. (C) Eating a balanced diet will help to reduce the chances of water retention occurring due to these issues. [title] Eat food that is rich in potassium. (D) [substeps] If you have recently cooked or baked a meal, make an effort to change your recipe one day. This can help your body prevent the retention.
[EX A]: C

[EX Q]: [header] How to fight the flu with pineapple juice [title] Go to the grocery store. [step] You will probably be able to find your ingredients in the produce section and in the baking goods/spices aisle. All of the ingredients in the drink (which is spicy but nice) are common in other flu-fighting home remedies. <sep> (A) [substeps] Hydrated fluids are recommended to prevent dehydration. Make sure to drink around 70% of the drink or higher to stay hydrated! Warm milk and whole coconut milk can really help to hydrate you as well. (B) So just be sure to read the list while you are in a store or at home for ingredients you might need for this recipe. [title] Calculate the quantities of the drink and the types. (C) You will need : [substeps] Pineapple juice--it's full of bromelain, which has been used as an anti-inflammatory. 6 fresh lemons 1 bulb of fresh garlic ginger powder honey cayenne pepper [title] Mix it up. (D) Spend some time by the vending machines in most grocery stores. That way you can get close to the produce section and line up your ingredients so you can buy individually.
[EX A]:
C