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]: Routers are basically systems, which connect ____ networks together.\Question: Choose the right answer from options given a) three b) two c) nine d) six
[A]: b


[Q]: Blood pressure is measured by ____ numbers.\Question: Choose the right answer from options given a) zero b) eight c) two d) seven
[A]: c


[Q]: Squirrels claim an area, usually ____ to seven acres in size.\Question: Choose the right answer from options given a) nine b) two c) one d) four
[A]:
c