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: All butterflies go through ____ life stages .\Question: Choose the right answer from options given a) one b) four c) zero d) five

SOLUTION: b

PROBLEM: All butterflies go through ____ distinct stages in their lives.\Question: Choose the right answer from options given a) eight b) seven c) four d) three

SOLUTION: c

PROBLEM: Piano duets are for two players at ____ piano.\Question: Choose the right answer from options given a) two b) one c) six d) three

SOLUTION:
b