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". 

Example Input: [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.
Example Output: D

Example Input: Men are sitting at a black jack table. A dealer deals them cards. they <sep> (A) high five and the man in red staggers into a table. (B) look at each other and begin talking. (C) give up and roll one of the cards. (D) play the game, making their card choices carefully.
Example Output: D

Example Input: They are swishing it in their mouths and almost all of them have their hands over their mouths. One of them spits it out in the sink and the other three are trying to carry on. they <sep> (A) are now following another man driving a car that sprays cleaner all over the car and he is shaking and smeared with the solution as well as laughing and bordering on spitting out some of it too. (B) try to talk to each other and take their fingers out of their mouths to talk. (C) all seem to be pretty groomers. (D) are having a really hard time and eventually they all spit out and one girl wins.
Example Output:
D