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: Most linguists organize the African languages into ____ major language families.\Question: Choose the right answer from options given a) three b) four c) eight d) no

A: b
****
Q: Midrange drivers are used in multi-way speakers with ____ or more driver sizes.\Question: Choose the right answer from options given a) one b) five c) four d) three

A: d
****
Q: Some cultures yield ____ or six species, and they are assigned consecutive letters.\Question: Choose the right answer from options given a) seven b) one c) four d) five

A:
d
****