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: Many aneurysms have ____ symptoms until they burst.\Question: Choose the right answer from options given a) no b) five c) six d) seven

SOLUTION: a

PROBLEM: Molecules are ____ or more atoms stuck together.\Question: Choose the right answer from options given a) two b) zero c) six d) eight

SOLUTION: a

PROBLEM: Carbon is stored in ____ main reservoirs.\Question: Choose the right answer from options given a) four b) no c) three d) five

SOLUTION:
a