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').

Plants have at least ____ sHSP gene families which comprise a large multigene family.\Question: Choose the right answer from options given a) zero b) eight c) five d) seven
c

Peonies grow from two to ____ feet in height.\Question: Choose the right answer from options given a) five b) zero c) three d) four
d

Gasoline is ____ times as expensive as in the United States.\Question: Choose the right answer from options given a) two b) four c) three d) ten

c