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 Input:
Malignant tumors are more dangerous, and survival times can range from ____ months to several years.\Question: Choose the right answer from options given a) one b) no c) ten d) six

Ex Output:
d


Ex Input:
Most Trusts have ____ or more Trustees.\Question: Choose the right answer from options given a) zero b) nine c) ten d) two

Ex Output:
d


Ex Input:
Leopard sharks range in size from three to ____ feet long and school in the shallows in the summer.\Question: Choose the right answer from options given a) four b) six c) two d) ten

Ex Output:

b