
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
An architect is designing a structure incorporating vertical pillars placed at the vertices of a regular hexagon $ABCDEF$, which lies flat on the ground. The structure will be capped with a slanted solar panel. The heights of the pillars at $A$, $B$, and $C$ are given as $15$, $12$, and $11$ meters, respectively. What is the height, in meters, of the pillar at $D$?
A) 15
B) 18
C) 20
D) 25

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