Task: Misc.
Input (English): Question: A *** can *** a serious disease. When a new *** is developed, it is given to a small group of people. Why would it be *** to *** each *** on a small group of people *** everyone can have one?  (A) to figure out how much the vaccine is worth (B) to determine how the vaccine will affect people (C) to understand how that disease affects the human body (D) to find out how many people are affected by the diseas.
Output (English): B.