
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
Which of the following values of \( n \) is a counterexample to the statement, 'If \( n \) is a prime number, then exactly one of \( n-2 \) and \( n+2 \) is prime'?
A) 11
B) 19
C) 21
D) 29
E) 37

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