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').

Example Input: Tropical trees can be rampant growers, and can outgrow a wiring in as little as ____ days' time.\Question: Choose the right answer from options given a) four b) eight c) six d) ten
Example Output: d

Example Input: Notebooks are laptop computers that weigh between five and ____ pounds.\Question: Choose the right answer from options given a) ten b) seven c) nine d) one
Example Output: b

Example Input: Burglars attack homes without electronic security ____ times more often than homes with a system.\Question: Choose the right answer from options given a) four b) three c) one d) eight
Example Output:
b