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". 

[Q]: A person is riding a bike over a trail. they <sep> (A) go over several jumps on the trail. (B) set up a camera in the middle of the trail. (C) are going down the road on a dirt trail. (D) go through a tunnel on the side.
[A]: A


[Q]: The doctor uses a brush to scrub nails and hands. A doctor washes their hands in a large stainless steel sink with hand soap multiple times. the doctor <sep> (A) uses the brush to rub a suture needle into his palms. (B) uses a towel to clean on the sink. (C) uses a small brush to wipe several areas on the body of the sink and change water for the other areas. (D) completely rinses their hands then clasps together and walks out of the room without touching anything.
[A]: D


[Q]: [header] How to make seafood sauce [title] Combine 12 tablespoons (180 ml) ketchup , 4 tablespoons horseradish, and 4 tablespoons lemon juice in a medium-sized bowl. [step] Stir vigorously. [title] Add celery salt and tabasco sauce to taste. <sep> (A) [step] Add one section of the reserved ketchup and stir again. [title] Transfer to a covered container or storage container. (B) [step] Stir gently in 2 tablespoons (10 ml) of freshly ground beef broth and 2 tablespoons (30 ml) of minced garlic. [substeps] If using mince, a pinch of salt is added instead. (C) [title] Refrigerate for one hour to chill and then serve. [step] Optionally, add lemon wedges to the dish so guests can squeeze in extra flavor. (D) [step] Allow to cook, covered, for 20 minutes. [title] Add shrimp and rock shrimp to the fish mixture.
[A]:
C