Denaturation profiles of DNA are shown below

 

The differences in the profiles arise because:

a. the DNA is single stranded but of different sizes.

b. AT content of A > B > C and the DNA are from complex genomes.

c. G+C content of C> B > A in DNA of comparable sizes isolated from simple genomes.

d. G+C content is identical but A+ T content in A > B > C in DNA of comparable sizes isolated from simple genomes.