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').

[EX Q]: Scorpions can live for ____ to seven years.\Question: Choose the right answer from options given a) one b) six c) five d) three
[EX A]: d

[EX Q]: Chlorine has ____ naturally occurring isotopes.\Question: Choose the right answer from options given a) nine b) eight c) three d) two
[EX A]: d

[EX Q]: Breast cancer affects ____ in eight women.\Question: Choose the right answer from options given a) no b) two c) one d) three
[EX A]:
c