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').

Example Input: Popular racism seems most prevalent in Italy which saw ____ deaths at the hands of racists.\Question: Choose the right answer from options given a) five b) two c) one d) four
Example Output: d

Example Input: Shamrocks can be ____ of four leafs.\Question: Choose the right answer from options given a) six b) seven c) zero d) three
Example Output: d

Example Input: Glaciers cover about ____ million square miles which is about three percent of the earth's surface.\Question: Choose the right answer from options given a) six b) nine c) one d) seven
Example Output:
a