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]: Notebooks are laptop computers that weigh between five and ____ pounds.\Question: Choose the right answer from options given a) ten b) seven c) nine d) one
[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]: Antibiotic therapy helps some dogs, even when there is ____ obvious infection.\Question: Choose the right answer from options given a) three b) ten c) no d) one
[A]:
c