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]: Flatbed scanners can also record ____ dimensional objects of many sizes and shapes.\Question: Choose the right answer from options given a) eight b) one c) four d) three
[EX A]: d

[EX Q]: Cougars have ____ toes with three distinct lobes present at the base of the pad.\Question: Choose the right answer from options given a) no b) four c) eight d) zero
[EX A]: b

[EX Q]: Volcanoes form in ____ different stages.\Question: Choose the right answer from options given a) nine b) six c) one d) two
[EX A]:
a