Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Input: Consider Input: Verbs have ____ functions in sentences.\Question: Choose the right answer from options given a) two b) eight c) no d) ten

Output: a


Input: Consider Input: Reservoirs cover an area of the planet ____ times the size of Britain.\Question: Choose the right answer from options given a) two b) eight c) three d) six

Output: d


Input: Consider Input: Prosthodontists typically train for ____ years to learn the best ways to restore dental implants.\Question: Choose the right answer from options given a) eight b) three c) zero d) two


Output: b