The correct answer is B. A simple sugar
Explanation:
The chart shows sample A contains Monosaccharides or simple sugars in the section "are these nutrients present" but does not contain substances such as starches, lipids, or proteins, which discards the idea that sample A is a protein, starch, or lipid. Moreover, this sample was positive in Benedict's Test that focuses on finding the presence of reducing sugars such as Monosaccharides.
According to this, it is likely sample A is a simple sugar because only substances that are simple sugars or contain a high amount of this substance are positive in Benedict's Test; moreover, the chart mentions this sample had monosaccharides, which is a synonym for simple sugars (substance with only one sugar unit).
