Which describes the structural properties of a eukaryotic chromosome?

• A. It contains a double-helix composed of nucleosomes each with four million base-pairs.
• B. It is one double-stranded linear DNA molecule bound to proteins for compaction.
• C. It is arranged into a 30 nm fiber which is attached to the cell membrane.
• D. It contains linker regions which are arranged into loops and coiled to form a helix