In the history of Chinese education,if we say （ ） is a symbol of official school in modern times，（ ）symbolizes the climax of the process where China learned from the Western world，then we can say （ ）is a successful example of private schools.
选项：

A:Nankai University Peking University Tsinghua University
B:Tsinghua University Peking University Nankai University
C: Peking University Tsinghua University Nankai University
D: Nankai University Tsinghua University Peking University