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: Malignant tumors are more dangerous, and survival times can range from ____ months to several years.\Question: Choose the right answer from options given a) one b) no c) ten d) six

A: d
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Q: Ants have ____ noses.\Question: Choose the right answer from options given a) zero b) eight c) five d) three

A: c
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Q: Biologists divide amphibians into ____ major groups or Orders.\Question: Choose the right answer from options given a) three b) one c) four d) ten

A:
a
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