
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 collection of cylindrical rings, each $2$ cm thick, are stacked on a hook. The largest ring at the top has an outside diameter of $18$ cm. Each subsequent lower ring has an outside diameter that is $2$ cm less than the ring directly above it. The smallest ring at the bottom has an outside diameter of $4$ cm. Quantify the vertical distance from the top surface of the top ring to the bottom surface of the bottom ring.
A) 74 cm
B) 76 cm
C) 78 cm
D) 80 cm

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