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').

Centrifugal pumps can usually handle up to about ____ percent by volume of air.\Question: Choose the right answer from options given a) one b) five c) eight d) seven
b

Evolution is dependent on ____ forces.\Question: Choose the right answer from options given a) no b) five c) two d) seven
c

Sporophytes form ____ types of sporangia.\Question: Choose the right answer from options given a) one b) nine c) zero d) two

d