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 sources claim there are more like ____ million vertebrate animals in zoos.\Question: Choose the right answer from options given a) six b) five c) one d) three
b

Most people recover in one to ____ months.\Question: Choose the right answer from options given a) no b) three c) seven d) eight
b

Vine maple is a native, deciduous shrub or small tree that ranges between ____ to twenty feet.\Question: Choose the right answer from options given a) two b) one c) seven d) ten

d