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]: Aridity presents ____ main obstacles to solitary behavior.\Question: Choose the right answer from options given a) no b) three c) two d) five
[A]: c


[Q]: Fruit trees are usually safe after ____ years.\Question: Choose the right answer from options given a) five b) four c) no d) three
[A]: d


[Q]: Birds can nest in snags as small as ____ inches in diameter.\Question: Choose the right answer from options given a) four b) six c) three d) two
[A]:
a