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: Ruminants have an even number of toes on each foot and a stomach with either three or ____ chambers.\Question: Choose the right answer from options given a) four b) two c) seven d) five

Output: a


Input: Consider Input: Redwoods reproduce ____ ways.\Question: Choose the right answer from options given a) zero b) two c) six d) nine

Output: b


Input: Consider Input: Bacteria are germs that multiply by splitting into ____ cells.\Question: Choose the right answer from options given a) three b) zero c) eight d) two


Output: d