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').

[Q]: Flowers have a ____ tolerance for pests and pest damage.\Question: Choose the right answer from options given a) seven b) three c) zero d) no
[A]: c


[Q]: Facial features are smooth and very ____ dimensional.\Question: Choose the right answer from options given a) zero b) four c) ten d) three
[A]: d


[Q]: Ecologists recognize ____ kinds of succession.\Question: Choose the right answer from options given a) zero b) one c) two d) six
[A]:
c