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 Input:
[header] How to eat to improve fertility [title] Be aware that having a balanced, healthy diet does not guarantee higher fertility. [step] There are many online sources and several books that claim that switching to a more balanced and healthy diet can lead to improved fertility. Though it is always beneficial to eat a healthy diet, it should not replace other fertility treatments and options. <sep> (A) Making sure that you are eating adequate and not too many calories or trans fats can lead to strong, lasting health patterns. In order to see results, eating a balanced diet is essential. (B) The key to avoiding eating more fertility treatments is truly taking in proper nutrients and the exercises you perform regularly. [substeps] Vitamin b6, vitamin b12 and high quality foods like bread and fruits help you to relax and begin functioning properly. (C) [substeps] Healthcare providers believe that we often mistake pre-existing disease as the cause of our fertility problems. These people often mistake their diet as their only sources of positive energy. (D) However, maintaining a healthy diet and lifestyle may reduce a woman's risk of irregular ovulation and could improve her chances of getting pregnant. [title] Keep in mind fertility diets may only work for a small subsection of women.

Ex Output:
D

Ex Input:
The man begins by scraping ice and snow off of the bottom of his windshield and the hood of his car and front grill. the man <sep> (A) then complies and drains ice from the sides. (B) dips a sponge into a liquid that gets in between the cars windshield. (C) then wipes the snow off his windshield and gets in his car crawling around. (D) then scrapes and kicks at ice chunks surrounding the area around the front passenger tire.

Ex Output:
D

Ex Input:
[header] How to zest a citrus fruit [title] Wash the citrus. [step] Before you get started, run the fruit under a stream of cool water, then buff it gently with a clean cloth or paper towel. A light rinse will help remove the natural waxy residue on the outside of the fruit. <sep> (A) [substeps] Make sure that the fruit is completely rinsed off before proceeding to the next step. Most citrus fruit will have the bruised part removed, but with the middle part, you can alternate between refreshing the peel with water and removing the skin. (B) [substeps] The work also is best done in the late evening, after the sugar has evaporated. [title] Make an acidic citrus by plunging a bowl of salt in the water. (C) You can also give the citrus a quick soak in a shallow bowl of water. [substeps] It's important to wash citrus fruit any time you're zesting, since the outside is the part that will actually be going into your food. (D) [title] Put the zest mixture in a dropper. [step] Commercially available zest comes from the peel of the citrus tree.

Ex Output:
C