I would go for B, because it is informing other scientists that could've been working on the same subject that here is a possible solution
<span>DNA the nitrgenous bases guanine and adenine are
</span>, Purines
there is no picture to tell the labels apart
FDA wants the labeling on your sunscreen to tell you more about protection against the sun's harmful rays.
Under a new regulation, the agency has proposed that sunscreen labeling be expanded to provide
a four-star rating system that informs consumers how well the product protects them against "Ultraviolet A" (UVA) light.Information on other ways people can limit their risks to dangers posed by overexposure to sunlight.