1. **State the problem:** Solve the equation $$-\frac{1}{2} n = -8$$ to find the value of $n$. 2. **Formula and rules:** To solve for $n$, we need to isolate $n$ by dividing both sides of the equation by the coefficient of $n$, which is $-\frac{1}{2}$. 3. **Isolate $n$:** $$n = \frac{-8}{-\frac{1}{2}}$$ 4. **Simplify the division:** Dividing by a fraction is the same as multiplying by its reciprocal: $$n = -8 \times \left(-2\right)$$ 5. **Calculate:** $$n = 16$$ 6. **Answer:** The value of $n$ that makes the equation true is $16$. Therefore, the correct choice is **D. 16**.