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').

Today there are ____ basic classifications of sausage.\Question: Choose the right answer from options given a) five b) four c) six d) one
a

Most children have a vocabulary of eight to ____ words, including names, by eighteen months of age.\Question: Choose the right answer from options given a) ten b) one c) seven d) eight
a

Navigators recognize up to eight different swells, ____ from each octant of the compass.\Question: Choose the right answer from options given a) seven b) two c) one d) nine

c