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').

Some programming languages have ____ or more standards.\Question: Choose the right answer from options given a) no b) seven c) two d) three
c

Water softeners add sodium to drinking water in ____ ways.\Question: Choose the right answer from options given a) zero b) six c) two d) nine
c

Sunflower oil costs about ____ times more than diesel fuel.\Question: Choose the right answer from options given a) two b) nine c) three d) seven

a