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]: Verbs have ____ functions in sentences.\Question: Choose the right answer from options given a) two b) eight c) no d) ten
[A]: a


[Q]: Some taxonomists classify only ____ species though.\Question: Choose the right answer from options given a) one b) six c) two d) three
[A]: c


[Q]: Ovarian tumors have ____ stages.\Question: Choose the right answer from options given a) nine b) six c) five d) four
[A]:
d