
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
The lengths of three adjacent sides of a quadrilateral are equal. The angle between the first and second of these sides is $60^{\circ}$ and the angle between the second and third of these sides is $100^{\circ}$. What is the largest angle of the quadrilateral?
A $130^{\circ}$
B $140^{\circ}$
C $145^{\circ}$
D $150^{\circ}$
E $160^{\circ}$

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