
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
If the margin made on an article costing $C$ dollars and selling for $S$ dollars is $M=\frac{2}{n}C$, determine the correct expression for the margin $M$ in terms of the selling price $S$.
A) $M = \frac{2}{n-1}S$
B) $M = \frac{2}{n}S$
C) $M = \frac{2n}{n+1}S$
D) $M = \frac{2}{n+2}S$
E) $M = \frac{2n}{n-1}S$

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