Who advocated for police personnel to have two or four years of college education in the late 1960s?

The correct choice highlights the President's Commission on Law Enforcement and the Administration of Justice as the advocate for requiring police personnel to have a higher educational background. This commission, established in 1965, was pivotal in analyzing the state of law enforcement in the United States and made various recommendations, including the necessity for police officers to engage in higher education, specifically suggesting two to four years of college.

The underlying rationale for this recommendation was based on the belief that a more educated police force would enhance operational effectiveness, improve decision-making skills, and foster better relationships with the communities they serve. By promoting higher education, the commission aimed to prepare law enforcement officers to confront the increasingly complex challenges of policing, particularly in an era characterized by social change and civil unrest.

The other options provided do not specifically advocate for educational requirements within policing during this pivotal period in the same way that the President's Commission did.