In a family of five members, $\text{A}$ is $\text{B}$ 's sister and $\text{C}$ is $\text{B}$ 's mother. $\text{D}$ is $\text{C}$ 's father and $\text{E}$ is $\text{C}$ 's mother. How is $\text{A}$ related to $\text{D}$?

Let's break down the relations step-by-step:
1. $\text{A}$ is the sister of $\text{B}⟹\text{A}$ is female.
2. $\text{C}$ is the mother of $\text{B}⟹\text{C}$ is the mother of both $\text{A}$ and $\text{B}$.
3. $\text{D}$ is the father of $\text{C}$.

Since $\text{D}$ is the father of $\text{A}$ 's mother ($\text{C}$), $\text{D}$ is the maternal grandfather of $\text{A}$. Therefore, $\text{A}$ is the granddaughter of $\text{D}$.