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]: Material culture is the realm of ____ dimensional objects that make up our everyday environment.\Question: Choose the right answer from options given a) ten b) three c) six d) four
[EX A]: b

[EX Q]: Echinoderms usually have ____ appendages, but there are some exceptions.\Question: Choose the right answer from options given a) ten b) five c) seven d) three
[EX A]: b

[EX Q]: Boys kill themselves ____ times more often than girls.\Question: Choose the right answer from options given a) five b) one c) four d) ten
[EX A]:
a