Who is eligible to apply for a Washington Concealed Pistol License (CPL)?

The correct answer is A. Any United States citizen or permanent resident over the age of 21 is eligible to apply for a Washington Concealed Pistol License (CPL). It is important to note that only individuals who meet these criteria can apply for a CPL in the state of Washington.

Options B, C, and D are incorrect because the CPL application eligibility is specifically for United States citizens or permanent residents over the age of 21, regardless of residency status.