
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
Given that $\text{C}$, $\text{D}$, and $\text{E}$ are nonzero digits, find the number of digits in the result of the following operation:
\[\begin{tabular}[t]{cccc} 5 & 4 & 3 & C \\ & 7 & 2 & 1 \\ - & D & E & 4 \\ \hline  \end{tabular}\]
A) 3
B) 4
C) 5
D) 6
E) Depends on the values of C, D, and E

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