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]: Pups remain in the den for about ____ weeks, and are cared for by the entire pack.\Question: Choose the right answer from options given a) ten b) three c) six d) no
[A]: c


[Q]: Smallmouth bass grow to ____ inches in their first growing season.\Question: Choose the right answer from options given a) five b) four c) seven d) ten
[A]: a


[Q]: Carbon has six protons and ____ electrons.\Question: Choose the right answer from options given a) one b) six c) no d) four
[A]:
b