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: Snowflakes are crystals that have many different shapes, but each snowflake has ____ points on it.\Question: Choose the right answer from options given a) six b) nine c) one d) seven

Output: a

Input: Consider Input: Marriage is the legal union of ____ people.\Question: Choose the right answer from options given a) one b) no c) five d) two

Output: d

Input: Consider Input: Crude oil is recovered by drilling holes as deep as ____ miles into the earth's crust.\Question: Choose the right answer from options given a) four b) five c) ten d) nine
Output: b