Calligraphy and painting written or drawn with ink can be preserved for a long time without discoloration because of the chemical properties of carbon.

A, calligraphy and painting because of the good quality of paper, can be preserved for a long time without discoloration.

B, the chemical properties of carbon are relatively stable at room temperature, and it is not easy to react with other substances. Correct.

C, calligraphy and painting can be preserved for a long time without discoloration, mainly because the preservation method is proper.

Under certain conditions, carbon can react with other substances.

So choose B.