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:
Alleles segregate independently yielding ____ possible allelic combinations in gametes.\Question: Choose the right answer from options given a) ten b) one c) four d) nine

Ex Output:
c


Ex Input:
Gravity is the force that brings ____ objects together .\Question: Choose the right answer from options given a) five b) two c) one d) nine

Ex Output:
b


Ex Input:
Ground beef can last up to ____ months, and chicken parts can stay good for nine months.\Question: Choose the right answer from options given a) six b) four c) five d) eight

Ex Output:

b