
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
In a city building affordable housing for the low-income population, there are 400, 300, and 200 low-income families in neighborhoods A, B, and C respectively. If the first batch of affordable housing consists of 90 units to alleviate the housing shortage, determine the number of households that should be selected from neighborhood A using stratified sampling.

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