
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 certain region, high schools are divided into three categories: Category A schools have a total of 2000 students, Category B schools have a total of 3000 students, and Category C schools have a total of 4000 students. If stratified sampling is used to select 900 students, then \_\_\_\_\_\_\_ students should be selected from Category A schools.

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