TASK DEFINITION: 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').
PROBLEM: Argentine ants are able to establish new colonies with as little as ____ worker ants and one queen.\Question: Choose the right answer from options given a) no b) two c) ten d) five

SOLUTION: c

PROBLEM: 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

SOLUTION: b

PROBLEM: Horses walk on ____ hoofed toe, and rhinos walk on three toes.\Question: Choose the right answer from options given a) five b) four c) one d) nine

SOLUTION:
c