The correct answers are A) They often included Christian symbols. C) They have intricate interlacing and overlapping. D) They often have symmetry in the decoration.
The statements about Celtic illuminated manuscripts that are true are the following: they often included Christian symbols, they have intricate interlacing and overlapping, and they often have symmetry in the decoration.
Celtic illuminated manuscripts are medieval ornates, perfectly elaborated with silver and gold, to produce the illuminated effect. Often, artists used gold leaf to "illuminate" the portraits or representations in the different pieces of work. One of the best examples of these beautiful pieces of art in the "Irish Book of Kells."