Personally, I would give it a B. Temperatures are nice year round, but it's too dry for trees.
The closest real-life climate I could find was
Gaborone, Botswana, but with seasons reversed. In case you're wondering how I found it, the summer precip maximum suggested either a subtropical east coast or tropical (but not equatorial) location. Mild climate suggested tropical location at a moderate elevation. Dryness ruled out South America and Asia, and probably Central America and Australia. Which left southern Africa.