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: Many scientists believe the neutrino has ____ mass at all.\Question: Choose the right answer from options given a) eight b) zero c) two d) no

Answer: d


Question: Spores have ____ combinations of sexes.\Question: Choose the right answer from options given a) four b) five c) seven d) three

Answer: a


Question: Most hyphenated words count as ____ words.\Question: Choose the right answer from options given a) three b) two c) one d) six

Answer:
b