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 find the number of a blocked call [title] Get an private branch exchange (pbx) account. [step] One option is asterisk, a free, open source software. Another is switchvox. <sep> (A) This will also work better than 200 blackwire. If you buy one, it will work with the same account ($ 0.11). (B) The pbx is considered to be a free exchange. While this service typically does not have much use for a desktop account, it gives you access to many anonymous call accounts. (C) A pbx converts your computer into a telecommunications device and will allow you to manipulate incoming call data to identify blocked callers. [substeps] Before embarking on this method ensure that you thoroughly understand the technical challenge it presents and the potential financial burden it incurs. (D) Without switchvox here you are on better business. No other option is available to get a contact number from an online website.

Output: C


Input: Consider Input: [header] How to pick a healthy sugar glider [title] Find a breeder. [step] If you want a sugar glider, your best option is to find a breeder. Breeders work specifically with sugar gliders and will have more knowledge about how to care for them, therefore increasing the risk of you obtaining a healthy pet. <sep> (A) [substeps] When visiting a breeder, look at their food and water dishes regularly. Good breeders will tell you how often and provide you with other food and water containers. (B) [substeps] Ask other breeders at local pet stores about their experience handling sugar gliders. If you want a sugar glider in your home, you'll want to make sure they have a dry skin. (C) [substeps] Finding a sugar glider breeder can be difficult. It's not as easy as finding a breeder for a particular kind of dog as there are few specific networks for breeding sugar gliders. (D) [substeps] If you will have a sugar glider in your home, breed it from their own genetics and pedigree, not the other way around. Don't get a sugar glider that has a steady and well-structured life.

Output: C


Input: Consider Input: [header] How to make lipstick last all day [title] Select a matte formula. [step] Not all lipsticks are created equal. Makeup artists suggest that in order of longevity matte formulas have the most staying power, followed by cream formulas, then liquid lipsticks, with lip glosses coming in last. <sep> (A) [substeps] It is unlikely that you'll find a lip gloss that lasts all day. The formula is designed to be slippery and shiny. (B) Choose it wisely: a matte formula like silicone will guarantee a more realistic look. [substeps] Lip gloss is fine, but the lasting effect will be somewhat dampened. (C) For younger children, the more frequently used formulas may be a suggestion. [title] Select a liquid formula if you make your lipstick cold or wet. (D) That's because the less liquid the better! Stick with a single creamy formula. [substeps] Formulas that are pink, brown or peach in color have the thinnest glittery finish.


Output: A