DNA, chromosomes, and traits
DNA is the molecule that contains the genetic instructions used in the development and functioning of all living organisms and some viruses. It is also responsible for the hereditary transmission and long-term storage of information about the traits of an individual.
In some phases of the cell cycle, the DNA is supercoiled, and together with some specific proteins, it takes the conformation of chromosomes, which fulfill their function in the passage of genetic information from parent to offspring in cell division.
Taking this information into account, the correct answer to this question is option D.