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]: 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
[A]: c


[Q]: Some homeopathic remedies are so dilute, ____ molecules of the healing substance remain.\Question: Choose the right answer from options given a) ten b) three c) one d) no
[A]: d


[Q]: Climatic regions Contrasts between the interior and the coasts produce ____ main climatic regions.\Question: Choose the right answer from options given a) five b) two c) nine d) six
[A]:
d