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]: Infants can tell their mothers from other mothers in ____ days.\Question: Choose the right answer from options given a) no b) zero c) five d) three
[A]: d


[Q]: Embrasures have ____ functions.\Question: Choose the right answer from options given a) three b) seven c) zero d) nine
[A]: a


[Q]: Integer numbers unite positive and negative up to ____ and create the number line.\Question: Choose the right answer from options given a) one b) ten c) eight d) no
[A]:
b