which of the following statements best explains the data set? responses since the %a and the %g add up to approximately 50 percent in each sample, adenine and guanine molecules must pair up in a double-stranded dna molecule. since the percent a and the percent g add up to approximately 50 percent in each sample, adenine and guanine molecules must pair up in a double-stranded d n a molecule. since the %a and the %t are approximately the same in each sample, adenine and thymine molecules must pair up in a double-stranded dna molecule. since the percent a and the percent t are approximately the same in each sample, adenine and thymine molecules must pair up in a double-stranded d n a molecule. since the %(a t) is greater than the %(g c) in each sample, dna molecules must have a poly-a tail at one end. since the percent open parenthesis, a plus t, close parenthesis is greater than the percent open parenthesis, g plus c, close parenthesis in each sample, d n a molecules must have a poly- a tail at one end. since the %c and the %t add up to approximately 50 percent in each sample, cytosine and thymine molecules must both contain a single ring.