It’s D because it’s literally common sense
A is untrue. Milk is way better for you than soda is.
Which of the following is an advantage of a condom as a method of birth control?
A.It helps prevent the spread of STIs.
DNA helps scientists to better classify organisms is because each organ has a specific kind of DNA. For an example, brains and hearts have many small types of RNA. So if a scientists see some RNA they know that its a heart or a brain.