Which statement is TRUE with regard to a DNA molecule?

A)The amount of adenine is equal to the amount of guanine, and the amount of thymine is equal to the amount of cytosine.
B)The amount of adenine is equal to the amount of cytosine, and the amount of guanine is equal to the amount of thymine.
C)The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of uracil.
D)The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine.