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 eat a maryland blue crab [title] Check to see if the blue crab is in season. [step] The maryland blue crab can be found fresh or pasteurized (sealed in cans and heated to kill pathogenic organisms) throughout the year, but it is not in season all year long. The crab season in maryland starts in april and ends in december. <sep> (A) [substeps] Crabs are usually less expensive at the beginning of the season. Crabs harvested in june through august are the most flavorful. (B) However, it may also be in the winter time, if temperatures are below freezing. Check the crab's growth schedule to make sure that it is in good shape. (C) [title] Buy a crab that is not in season through meat and seafood market. [step] When all meat gets picked up, the crab goes into season. (D) [title] Purchase crab with a cold peg before your meal. [step] A cold peg nips off the bottom of the crab's shell, so check carefully when purchasing it.

Ex Output:
A

Ex Input:
A marching band is in the midle o street. behind the marching band <sep> (A) people are in s street playing. (B) the drummers are covering the ground. (C) , a tire is taken off and replaced with a new tire. (D) a fire truck is in the parade.

Ex Output:
D

Ex Input:
[header] How to study and understand pancreatic failure in humans [title] Learn what is pancreatic failure. [step] Pancreatic failure refers to a disorder of the pancreas in which its exocrine cells are degenerated and destroyed. This in turn leads to its inability to secrete its usual digestive enzymes into the intestinal canal. <sep> (A) In total you have pancreatic failure. [title] Prepare yourself mentally for what will take place. (B) Improperly digested foods and trans fats can lead to pancreatic failure in humans. [substeps] Avoiding or avoiding food and trans fats can also prevent pancreatic failure. (C) This in turn causes maldigestion and accompanying constipation symptoms. [title] Study the causes of pancreatic failure. (D) This enables the body to secrete fluids into the pancreas which ultimately controls this digestion. [substeps] Pancreatic failure can be caused by the digestive system inadequate dht (glucoadrenaline).

Ex Output:
C