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').

[EX Q]: Decompression illness is a continuum from ____ symptoms or signs to severe multisystem involvement.\Question: Choose the right answer from options given a) nine b) three c) no d) one
[EX A]: c

[EX Q]: Manatees swim two to ____ miles per hour.\Question: Choose the right answer from options given a) no b) six c) five d) zero
[EX A]: b

[EX Q]: Medical abortions require ____ doctors' visits, driving up the cost.\Question: Choose the right answer from options given a) six b) three c) seven d) nine
[EX A]:
b