
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 rectangular region measures 15 by 20 units. A smaller rectangle, which is one-fifth of the large rectangle, is placed inside it. What fraction of the large rectangular region is shaded if one-half of this smaller rectangle is shaded?
A) $\frac{1}{15}$
B) $\frac{1}{12}$
C) $\frac{1}{10}$
D) $\frac{1}{5}$
E) $\frac{1}{8}$

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