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').

Q: Moles breed in late winter or spring and have a gestation period of ____ to six weeks.\Question: Choose the right answer from options given a) nine b) four c) six d) five

A: b
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Q: Fryers have ____ thermostats.\Question: Choose the right answer from options given a) five b) three c) two d) one

A: c
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Q: Isometric crystals have ____ axes of symmetry that are all at right angles to each other.\Question: Choose the right answer from options given a) one b) three c) eight d) four

A:
b
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