
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
Let the product $(21)(25)(26)$, each factor written in base \( b \), equals $7536$ in base \( b \).  Let \( s = 21 + 25 + 26 \), each term expressed in base \( b \). Then \( s \), in base \( b \), is:
**A) 72**, **B) 73**, **C) 74**, **D) 75**, **E) 76**

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