Given are some statements with reference to the use of genes in plant molecular systematics.

(A)    mtDNA are not preferred over cpDNA or rDNA because they generally show slow rate of sequence evolution and fast rate of structural evolution.
(B)    cpDNA are not preferred because of their haploidy, uniparental inheritance, and absence of recombination among cpDNA molecules.
(C)    rDNA such as ITS are preferred for their higher evolutionary rates as well as shorter sequence length.
(D)    rDNA and cpDNA cannot be used simultaneously in molecular systematics since they represent conflicting patterns of inheritance.
 Which of the above statements are INCORRECT ?