
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
Marina donates blood on February 1st, when a unit of blood expires exactly after $9!=9\cdot 8 \cdot 7 \cdot \ldots \cdot 1$ seconds. Assume February has 28 days (non-leap year). Determine the day her blood expires.
A) February 3
B) February 4
C) February 5
D) February 6

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