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 choose a protein supplement [title] Choose whey protein to build muscle. [step] If you're looking for muscle-building protein, whey protein is generally your best option. Whey protein can come in the form of powder or pills and is commonly used when people are trying to build muscle via things like weight training programs. <sep> (A) By doing this, you're gaining more body fat and growing more muscle at the same time. [substeps] Whey protein can be found in half of the packaged foods. (B) Whey protein is also a low-fat protein, rich in red blood cells from bacteria. Although whey protein does not impart healthy fats to the body, whey protein helps build muscle, which you can grow and burn through exercise. (C) [substeps] Look for a whey protein powder or supplement with a high biological value. This measures how well your body can absorb the protein. (D) Whey protein occurs as a food chain, hence the slogan, " protein is fat free ". [substeps] Whey protein is complex and varies from patient to patient.

Output: C


Input: Consider Input: . four bikers at the start of the line <sep> (A) get no a jump. (B) are wearing different colors of uniforms and helmets, they are about to get start the race. (C) leave and race towards a parking lot on the right. (D) go on the parallel bars but they can't take off their bikes.

Output: B


Input: Consider Input: [header] How to convert a vhs to dvd [title] Purchase a dvd recorder. [step] A vhs-to-dvd recorder basically gives you a dvd copy of your tape in real time. [substeps] Dvd recorders cost between $100-$200 at major electronic stores or online. <sep> (A) You can also usually find one between $50-$75 in good condition on ebay. With a dvd recorder, you don't have a lot of flexibility as far as menus, buttons and chapter settings, but it's the fastest and easiest way to convert vhs to dvd. (B) If you only need a sound editing editing device, look at the websites of several electronics manufacturers. However, this can be expensive and require you to play the audio on multiple devices. (C) If you still can't get a dvd recorder, go to your phone's dvd arcade and search for vhs-to-dvd player stores. Handheld circular sockets such as vhs drives and small electronics can sometimes be found. (D) If you're in a financial area, choose a dvd recorder that is comfortable with the motherboard backing you might use from your dvd port to take your dvd player to malwarebytes packaging. Many vhs-to dvd recorders use a standard wav casing.


Output: A