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').
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Question: Ostriches have ____ stomachs.\Question: Choose the right answer from options given a) four b) nine c) eight d) three

Answer: d


Question: Background radiation comes from ____ sources.\Question: Choose the right answer from options given a) zero b) three c) four d) no

Answer: b


Question: Pipits are ground nesters , laying up to ____ speckled eggs .\Question: Choose the right answer from options given a) ten b) three c) six d) five

Answer:
c