The P3O® Foundation (2013) manual describes a decentralized P3O model as using hub offices, a central office for portfolio support, and COE standards with local variations. Section 5.3.1 states, "A decentralized P3O model utilizes hub offices to meet local needs, maintains a central office for portfolio oversight, and applies standards set by a central COE with tailored local variations." A single office (2) defines a centralized model, not decentralized. The 2013 edition highlights this structure for flexibility and consistency, making C the correct choice. This ensures effective support across diverse regions.