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: Onion thrips experience ____ instars.\Question: Choose the right answer from options given a) three b) six c) eight d) four

Answer: d


Question: Diatoms look like ____ shells that fit together.\Question: Choose the right answer from options given a) zero b) one c) two d) seven

Answer: c


Question: Postpartum depression affects nearly ____ in ten new mothers, and in varying degrees of intensity.\Question: Choose the right answer from options given a) nine b) two c) one d) three

Answer:
c