
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
Evaluate the expression $1 - \frac{1}{1 + \frac{b}{1 + b}}$ and identify its simplest form.
**A)** $\frac{b}{1 + 2b}$ if $b \neq -\frac{1}{2}$ \
**B)** $b$ if $b \neq 0$ \
**C)** $1$ \
**D)** $b$ if $b \neq -\frac{1}{2}$ \
**E)** $1 - b$

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