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').
--------
Question: Nymphs feed and mature through ____ instars in about six to eight weeks.\Question: Choose the right answer from options given a) four b) eight c) five d) no

Answer: c


Question: Children are more likely than adults to show ____ symptoms even if they are infected.\Question: Choose the right answer from options given a) eight b) two c) no d) six

Answer: c


Question: Rifts develop from separate domes creating ____ legged rift faults that join each other.\Question: Choose the right answer from options given a) zero b) one c) no d) three

Answer:
d