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: Young emus are very vulnerable to disease until they are about ____ months old.\Question: Choose the right answer from options given a) no b) ten c) six d) three

SOLUTION: d

PROBLEM: Granite occurs in ____ separate masses.\Question: Choose the right answer from options given a) two b) eight c) nine d) no

SOLUTION: a

PROBLEM: Sponges fall into ____ main groups according to how their bodies are organized.\Question: Choose the right answer from options given a) zero b) no c) three d) five

SOLUTION:
c