instruction:
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').
question:
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
answer:
b


question:
Females reach sexual maturity around ____ to five year-olds.\Question: Choose the right answer from options given a) four b) five c) one d) ten
answer:
a


question:
Most children have a full set of twenty primary teeth by the time they re ____ years old.\Question: Choose the right answer from options given a) ten b) three c) zero d) seven
answer:

b