According to the sentences in the box in the picture, the calligraphy works of Zhu Zhishan, a calligrapher in the Ming Dynasty, are correct.

The font of the work is seal script, which is characterized by rounded strokes, so it is correct;

(3) seal script was written in Qin and Han dynasties, so it was excluded;

④ The development history of calligraphy art is not that one calligraphy art replaces another, but that * * * develops together, so it is correct;

So choose C.