
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
The city administration of a certain city launched a campaign that allows the exchange of four empty 1-liter bottles for one full 1-liter bottle of milk. How many liters of milk can a person obtain if they have 43 empty 1-liter bottles by making several of these exchanges?  
(a) 11  
(b) 12  
(c) 13  
(d) 14  
(e) 15

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