
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 large square of side-length 10 cm contains a smaller square of side-length 4 cm. The corresponding sides of the two squares are parallel. What percentage of the area of the large square is shaded?

A) 25%
B) 30%
C) 40%
D) 42%
E) 45%

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