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 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.

Ex Output:
D


Ex Input:
There is a black dog and a white dog jumping around the person raking the leaves. The white dog is trying to bite off the rake. both the dogs <sep> (A) are walking on the grass and one of the dogs is falling. (B) are standing back on his hind legs trying to get out of the rake. (C) are playing around the man raking the leaves, trying to bite the rake. (D) do this trying to be very nice.

Ex Output:
C


Ex Input:
A woman in a green dress smokes and holds her ears. A man in a blue suit dances in the room. The man continues playing the violin. people <sep> (A) walk around the beach. (B) pass him an the violin and the music ends. (C) dance in the room. (D) in bowling shirts grab bowling pins and hold them in the air.

Ex Output:

C