TASK DEFINITION: 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').
PROBLEM: Many animals use two or ____ forest structure types.\Question: Choose the right answer from options given a) eight b) zero c) two d) three

SOLUTION: d

PROBLEM: Digital bandwidth enables signal to be condensed as a five to ____ ratio.\Question: Choose the right answer from options given a) one b) nine c) seven d) six

SOLUTION: a

PROBLEM: Food generally takes about ____ hours to make it from the mouth to the end of the small intestine.\Question: Choose the right answer from options given a) three b) nine c) one d) four

SOLUTION:
d