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]: Women are ____ times as likely as men are to develop osteoporosis.\Question: Choose the right answer from options given a) zero b) four c) one d) nine
[A]: b


[Q]: Mechanical stability comes from having fused quartz, in ____ gravity, cold.\Question: Choose the right answer from options given a) five b) zero c) six d) two
[A]: b


[Q]: Knowledge interacts with consciousness on ____ levels.\Question: Choose the right answer from options given a) ten b) zero c) one d) two
[A]:
d