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: Pups get their sight in about ____ days.\Question: Choose the right answer from options given a) five b) six c) ten d) nine

SOLUTION: c

PROBLEM: Orangutans spend up to ____ hours a day eating or foraging for food.\Question: Choose the right answer from options given a) seven b) nine c) three d) six

SOLUTION: d

PROBLEM: Microbial inhabitants outnumber our body's own cells by about ____ to one.\Question: Choose the right answer from options given a) nine b) ten c) two d) eight

SOLUTION:
b