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').

[EX Q]: Female bilbies have a backward-opening pouch with ____ nipples.\Question: Choose the right answer from options given a) no b) two c) five d) eight
[EX A]: d

[EX Q]: Fawns weigh about ____ to nine pounds at birth.\Question: Choose the right answer from options given a) five b) ten c) nine d) six
[EX A]: d

[EX Q]: Fiddler crabs mate every ____ weeks in summer.\Question: Choose the right answer from options given a) three b) no c) ten d) two
[EX A]:
d