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]: Sound waves travel through the air in a similar manner, but in all ____ dimensions.\Question: Choose the right answer from options given a) three b) five c) nine d) one
[EX A]: a

[EX Q]: Ozone is a naturally occurring molecule containing ____ atoms of oxygen.\Question: Choose the right answer from options given a) three b) five c) nine d) eight
[EX A]: a

[EX Q]: Teenage bodies are ____ times more susceptible to alcohol addiction than adults.\Question: Choose the right answer from options given a) eight b) three c) six d) no
[EX A]:
b