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:
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.

Ex Output:
D


Ex Input:
More shots are shown of a website as well as the outside of the shop while the men continue to speak. more people <sep> (A) then arrive to take pictures and a bored man is unable to participate. (B) are shown drinking coffee as well as sit in front of their computer talking and participating in the board as well as meeting with one another and riding in a raft. (C) are seen getting tattoos while the men still speak to the camera. (D) are then seen controlling a large group of horses and leading them around a very large gate as well as running underneath it and bumping into the fences.

Ex Output:
C


Ex Input:
[header] How to reduce radon [title] Take radon-reduction training courses. [step] Without the right equipment and techniques, you could actually increase the levels of radon in your home! If you decide not to use a certified contractor to reduce radon, it's essential that you contact your state radon office to find training courses in your area. Enroll in and attend these training classes to learn how to properly reduce radon levels. <sep> (A) [substeps] For instance, you'll learn how to properly test for radon. You may also be taught how air pressure affects ventilation and how radon moves through water. (B) Your area will have some information on " local " radon manufacturer training programs. [substeps] It's best to talk to a supervisory/certified contractor before taking any oiling classes. (C) [substeps] Also pay attention to lighting (sunlight will slow down radon levels) and ventilation. Water soluble radon can fall down your drain. (D) [substeps] Many websites offer basic scas training courses but others will provide recommendations on how to make water consumption safer. Ask your local environmental authority for a list of certified contractor qualified to train.

Ex Output:

A