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').
--------
Question: 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

Answer: a


Question: Breast cancer strikes one out of every ____ American women.\Question: Choose the right answer from options given a) one b) nine c) no d) six

Answer: b


Question: American women are ____ to six times more likely to die of heart disease than of breast cancer.\Question: Choose the right answer from options given a) zero b) ten c) seven d) four

Answer:
d