Animal Species Exhibit an Enormous Diversity of Genetic Information Contained

Animal species exhibit an enormous diversity of genetic information contained in nuclear DNA.This difference in DNA may be reflected in very different genome sizes.Scientists investigating the possibility that animals with more complex morphological structures might express greater numbers of different types of mRNAs during development found that similar numbers of genes were transcribed at a particular time in development in species whose genome sizes differed greatly in size.How can this result be interpreted?

A) Some species retain large amounts of DNA that are never used.
B) The number of genes transcribed at any one time is tightly regulated,independent of genome size.
C) Genome size has nothing to do with the physical complexity of the species.
D) Nuclear DNA complexity is unrelated to the complexity of mRNAs transcribed during development.