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:
Notebooks are laptop computers that weigh between five and ____ pounds.\Question: Choose the right answer from options given a) ten b) seven c) nine d) one

Ex Output:
b


Ex Input:
Cigarette smokers are ____ times more likely to die of lung cancer than nonsmokers.\Question: Choose the right answer from options given a) ten b) six c) four d) nine

Ex Output:
a


Ex Input:
Chronic pain is any painful condition lasting for more than ____ months.\Question: Choose the right answer from options given a) five b) two c) six d) one

Ex Output:

c