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". 

[header] How to solo travel to vienna [title] Plan to stay in a hostel. [step] When traveling alone, it's always a good idea to stay at a hostel. Not only are hostels generally cheaper than hotels, this will help you meet people during your travels. <sep> (A) Taking advantage of free accommodations can help you pass the time and save money. [title] Plan initial backpackers getting used to the cities and customs of vienna on the flat travelling budget. (B) While there are many events you may enjoy alone, vienna has a booming nightlife. On occasion, you may want company for a night out, so a hostel is a good option for this. (C) It will also offer a safe, modern way to escape from the nightlife. An hostel is also a good place to set your budget on a day-to-day basis as you decide if you want to stay alone. (D) Search online for hostels near you if you want to take a trip somewhere you've never been, and plan to stick to the hostel's offerings. [substeps] The best traveling companions who are available in these places will be people who seem friendly, adventurous, and easily reunited from their long life.
B

[header] How to recognize symptoms of sickle cell disease (scd ) [title] Get tested. [step] Sickle cell disease can be detected with a simple blood test, so if you think you may have the disease, see a doctor to get tested right away. In the united states, all newborns are required to be screened for sickle cell disease. <sep> (A) [substeps] The screening process is lengthy and requires some paperwork so a doctor can make sure they're perfect. In order to receive diagnosis or treatment, the doctor must first perform a screening test. (B) The more advanced the developing disease, the more likely it is that you may have sickle cell disease. It is a serious disease that causes weight gain, and may affect when you are pregnant. (C) The centers for disease control and prevention (cdc) website has more information on the disease than it does on its own. [title] Be aware of your potential risk factors. (D) This is because early treatment is very beneficial to patients. [substeps] It is also possible to do prenatal screening for sickle cell disease by testing fetal tissues that are collected by chorionic villus sampling or amniocentesis.
D

[header] How to do a quiff for women [title] Gather the hair at the top of your head. [step] The section needs to start at your forehead and go back towards your crown. It needs to be the same width as your eyebrows at the front, and end in a u-shaped curve in the back, rather than a v-shaped point. <sep> (A) [substeps] Use the handle of a rat-tail comb to create neat and even parts. This method works the best with jaw-length hair. (B) [substeps] French braids can help reverse the twisted style that prevents the quiff from going back on top. If you'd like your twist to be bigger, place your hand above your head and position the hair straight so your left side hangs straight down. (C) [title] Pull the front section back to your hairline. [step] The frizzier the lower hairline, the straighter the quiff will be. (D) Hair gel or hairspray work well to keep the hair to a natural color throughout your day. [title] Layer your hair so that it covers most of your head from your ears to the nape of your neck.

A