
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]


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In a high school with 500 students in the first grade, there are 200 students with blood type O, 125 with blood type A, 125 with blood type B, and 50 with blood type AB. To study the relationship between blood type and color blindness, a stratified sampling method is used to draw a sample of 40 students. How many students with blood type O should be drawn?

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