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: Vampires generally are male, and rabies is ____ times more frequent in men than in women.\Question: Choose the right answer from options given a) no b) two c) zero d) seven

Answer: d


Question: Asthma accounts for ____ in six of all pediatric emergency visits in the United States.\Question: Choose the right answer from options given a) four b) seven c) one d) six

Answer: c


Question: Neutron stars are very dense, only ____ or twenty kilometres across, but more massive than our Sun.\Question: Choose the right answer from options given a) eight b) seven c) nine d) ten

Answer:
d