
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
Four identical small rectangles are put together to form a large rectangle. The length of a shorter side of each small rectangle is 10 cm. What is the length of a longer side of the large rectangle?
A) 50 cm
B) 40 cm
C) 30 cm
D) 20 cm
E) 10 cm

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