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').

Chemistry has ____ less important names.\Question: Choose the right answer from options given a) ten b) no c) eight d) nine
b

Argentine ants are able to establish new colonies with as little as ____ worker ants and one queen.\Question: Choose the right answer from options given a) no b) two c) ten d) five
c

Object codes are the last four digits of the ____ digit account code.\Question: Choose the right answer from options given a) one b) ten c) two d) zero

b