
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 $20$-quart radiator is initially filled with a 50% water and 50% antifreeze mixture. Five quarts are removed and replaced with pure antifreeze. This process is repeated three more times. Compute the fractional part of the final mixture that is water.
A) 0.158
B) 0.234
C) 0.139
D) 0.317

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