
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 newspaper conducted a survey on "What is the spirit of Lei Feng in the new era". The number of questionnaires collected from units A, B, C, and D formed an arithmetic sequence, and a total of 1000 questionnaires were collected. For the purpose of reporting, a stratified sample of 150 questionnaires was drawn according to the unit. If 30 questionnaires were drawn from unit B, how many questionnaires were drawn from unit D?

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