In what type of waters may an agent board a vessel?

The correct choice identifies that an agent may board a vessel in both high seas and inland waters, which aligns with the jurisdictional authority typically granted to law enforcement, particularly in maritime contexts. High seas, which extend beyond national jurisdictions, allow agents to enforce laws against piracy, trafficking, and other criminal activities. Inland waters, which include rivers, lakes, and coastal areas, fall under the jurisdiction of national laws where law enforcement agencies can conduct operations to protect interests, prevent crime, and ensure safety.

This understanding applies globally, as international agreements often stipulate the rights and responsibilities of agents in these waters. High seas and inland waters constitute the primary areas where agents would conduct enforcement actions, adhering to legal parameters regarding maritime law.

The other options are limited in scope and do not accurately represent the full range of waters where agents can act. For instance, freshwater lakes only restrict operations to a specific type of body of water, while designating only harbors or protecting marine areas further narrows the jurisdiction, making it inconsistent with the broader powers typically held by maritime law enforcement.