单项选择题
The tangheng style folk dwellings with three hall on the central axis and one row of side house on each side is called_______.
A.liang-tang san-heng (two “tang” house and three “heng” house)
B.san-tang liang-heng (three “tang” house and two “heng” house)
C.san-tang si-heng (three “tang” house and four “heng” house)
D.san-tang liu-heng (three “tang” house and six “heng” house)