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: Corn borers complete at least ____ generations each summer.\Question: Choose the right answer from options given a) zero b) three c) two d) ten

Answer: c


Question: Dunes are of ____ types - linear and parabolic.\Question: Choose the right answer from options given a) three b) four c) ten d) two

Answer: d


Question: Snail shells have spiral symmetry, and delphiniums have ____ equally spaced petals.\Question: Choose the right answer from options given a) one b) five c) two d) ten

Answer:
b