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').

Big bluestem grows up to ____ feet tall.\Question: Choose the right answer from options given a) seven b) no c) nine d) eight
c

Adult tarantulas require a minimum of ____ to five crickets a week.\Question: Choose the right answer from options given a) seven b) three c) four d) five
b

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

c