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]: Most females are sexually mature at about ____ to six years.\Question: Choose the right answer from options given a) eight b) nine c) five d) two
[EX A]: c

[EX Q]: Most spiders have ____ eyes, some only six and several have fewer or none.\Question: Choose the right answer from options given a) ten b) two c) eight d) no
[EX A]: c

[EX Q]: Elliptical galaxies are probably a mix of all ____ shapes.\Question: Choose the right answer from options given a) seven b) three c) two d) four
[EX A]:
b