What are the Three Wonders in Huizhou?

下列变量名中，_________是合法的。 A: HUIZHOU B: cmd-add C: new D: a/2

Most of the Huizhou Local Residential Houses date from the Ming Dynasty (1368-1644) and Qing Dynasty (1644-1911), and amount to thousands widely dispersed throughout the _______countryside.

Which one does NOT belong to the Chinese Folk Houses? A: Beijing Courtyard Houses B: Shanxi Cave Dwellings C: Suzhou Gardens D: Huizhou Cilvil Residents