How the structure of complex carbohydrates such as starch makes them suited for energy storage?

Well, Polysaccharides are complex carbohydrate polymersc consisting of more than 2 monosaccharides together covalently by glycosidic linkages in a condensation reaction. There are two types of polysaccharides first homo-polysaccharides and hetero-polysaccharides. A homo-polysaccharide is defined to have only one type of monosaccharide repeating in the chain; whereas, a hetero-polysaccharide is composed of two or more types of monosaccharides.

The answer is A.  This involves taking a good sample (using sampling techniques) of mathematicians or maths students and subjecting them to different treatments of peppermint before sitting them in a maths exam and examining the maths results. This should also be compared to a control group – not subjected to peppermint but also sitting them for exams- with which to compare the results.