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: Hybridization is the practice of ____ different species interbreeding.\Question: Choose the right answer from options given a) no b) one c) two d) three

Output: c


Input: Consider Input: Black bears stand ____ to six feet long and almost three feet at the shoulders when on all fours.\Question: Choose the right answer from options given a) three b) five c) four d) one

Output: b


Input: Consider Input: Congenital stenosis has ____ main types, membranous and cartilaginous.\Question: Choose the right answer from options given a) three b) two c) zero d) nine


Output: b