
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A container is initially full of water. First, one third of the water is poured out. Then, one fourth of the remainder is poured out, and continue in this manner such that one fifth of the remainder for the third pouring, one sixth for the fourth pouring, etc. After how many pourings does exactly one fifth of the original water remain?
A) 7  
B) 8  
C) 9  
D) 10  
E) 11

Present the answer in LaTex format: \boxed{Your answer}
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