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: Most internal parasites are specific to one or ____ species.\Question: Choose the right answer from options given a) seven b) three c) two d) five

Output: c


Input: Consider Input: Most school aged children pass at least ____ stools per week, with an average of one stool per day.\Question: Choose the right answer from options given a) three b) one c) six d) zero

Output: a


Input: Consider Input: Sharks have ____ to seven gill slits.\Question: Choose the right answer from options given a) five b) seven c) three d) four


Output: a