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: Lung disease is America's number three killer, responsible for ____ in seven deaths.\Question: Choose the right answer from options given a) five b) nine c) one d) four

Answer: c


Question: Influenza epidemics are ____ times more likely during solar maxima.\Question: Choose the right answer from options given a) ten b) eight c) no d) four

Answer: d


Question: Thunderstorms occur infrequently throughout the year, averaging ____ annually.\Question: Choose the right answer from options given a) one b) zero c) five d) seven

Answer:
c