Which of the following is the most accurate description of the link between chromosomes & DNA?

A. DNA is packed into tightly wound structures called chromosomes inside the nucleus.

B. Chromosomes are loose strands of DNA – Chromatin is loose strands of DNA that condense to form chromosomes
C. Chromosomes are made up of 4 nitrogenous bases inside DNA. – DNA has 4 nitrogenous bases inside chromosomes
D. DNA is made up of chromosomes – Chromosomes are made up of sets of genes that contain DNA