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').
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Question: Birds have ____ eyes.\Question: Choose the right answer from options given a) eight b) five c) nine d) two

Answer: d


Question: Habitat destruction is a concern for all ____ gorilla subspecies.\Question: Choose the right answer from options given a) no b) four c) three d) five

Answer: b


Question: Telomeres are composed of a repeated ____ base sequence that are lost during cell division.\Question: Choose the right answer from options given a) six b) one c) eight d) four

Answer:
a