HELP PLEASEEEE

Twin Labrador Retriever puppies were born from a black mother and a golden father. One puppy was born black and the other was born golden. These two puppies have different traits because their DNA has___.

A. different amounts of deoxyribose sugars in their DNA molecules

B. different arrangements of nucleotides

C. different amounts of thymine nitrogen base

D. different numbers of proteins found within their cells