Concept:Humid subtropical climates are found on the eastern sides of continents between about 25° and 40° latitude, with warm ocean currents and year‑round rainfall.
Explanation:First, identify the typical locations of humid subtropical climate: hot summers, mild winters, and rainfall throughout the year. These conditions occur along the east coasts of continents in the mid‑latitudes, for example South Japan, east coast of Australia, and parts of coastal South Africa (Durban).
Second, examine South Argentina. It lies at higher latitudes (Patagonia) and is influenced by the cold Humboldt Current and strong westerlies, resulting in a cold steppe or desert climate, not humid subtropical.
Third, verify the other options: Coastal South Africa (warm Agulhas Current), east coast of Australia (warm East Australian Current), and South Japan (Kuroshio Current) all meet the temperature and rainfall criteria.
Thus, only South Argentina does not experience a humid subtropical climate.
Answer:South Argentina (Option D)