
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 5x5 square is divided into 25 cells, all initially white. Neighbouring cells share a common edge. On each move, the colors of two neighbouring cells are changed to the opposite color (white cells become black and black ones become white). What is the minimum number of moves required to obtain a chess-like colouring? Options: 
A) 11 
B) 12 
C) 13 
D) 14 
E) 15

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