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').

[EX Q]: Infants usually die of pneumonia or other infections before reaching ____ years of age.\Question: Choose the right answer from options given a) nine b) four c) zero d) eight
[EX A]: b

[EX Q]: Rheumatic fever begins one to ____ weeks after an untreated streptococcal infection.\Question: Choose the right answer from options given a) six b) ten c) two d) zero
[EX A]: a

[EX Q]: Trees are a long-term investment that can take up to ____ years to produce.\Question: Choose the right answer from options given a) no b) four c) ten d) six
[EX A]:
d