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').
--------
Question: Fryers have ____ thermostats.\Question: Choose the right answer from options given a) five b) three c) two d) one

Answer: c


Question: Hummingbirds feed every ____ to fifteen minutes from sun-up to sundown.\Question: Choose the right answer from options given a) nine b) seven c) four d) ten

Answer: d


Question: Compound leaves grow in groups of ____ toothy parts.\Question: Choose the right answer from options given a) seven b) three c) zero d) six

Answer:
b