Questions that require substituting values into expressions with rational or integer exponents and simplifying using index laws to obtain a numerical answer.
Among other research objects, Allometry studies the relationship between measurements of different parts of the human body. For example, according to Allometry, the area A of the body surface of a person relates to their mass $m$ by the formula $A = k \cdot \mathrm{~m}^{\frac{2}{3}}$, where $k$ is a positive constant. If during the period from childhood to adulthood of an individual their mass is multiplied by 8, by how much will the area of body surface be multiplied? (A) $\sqrt[3]{16}$ (B) 4 (C) $\sqrt{24}$ (D) 8 (E) 64