What was one of the key developments in police dog training during the Renaissance period in the 1980s?

The correct answer highlights a significant trend in police dog training during the 1980s, where American law enforcement officers began traveling to Germany for specialized training. This development was crucial because Germany has a long-standing reputation for its methods in dog training, particularly in the areas of obedience, tracking, and detection work. The training practices adopted from German techniques allowed American police forces to enhance their operational effectiveness with K9 units by implementing sophisticated training models that focused on the dog's ability to work alongside handlers efficiently. This exchange of knowledge fostered advanced training methodologies that were more widely accepted and standardized in law enforcement agencies across the United States.

The arrival of new dog breeds, while relevant in dog training, did not focus on the training methodologies and techniques that were evolving during that time. Training based on hearsay would lack the structure and scientific backing necessary for effective law enforcement practices. The mention of technology's implementation, while important in a broader context, did not specifically relate to the key training developments of that distinct era in the same way the exchange of knowledge and techniques did between American and German law enforcement.