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').

Ex Input:
Smallmouth bass grow to ____ inches in their first growing season.\Question: Choose the right answer from options given a) five b) four c) seven d) ten

Ex Output:
a


Ex Input:
China is reportedly in the top ____ nations in industrial output.\Question: Choose the right answer from options given a) seven b) ten c) three d) five

Ex Output:
b


Ex Input:
Plant life is critical to all ____ life cycles.\Question: Choose the right answer from options given a) nine b) no c) two d) three

Ex Output:

d