Consider the statements: I: $ (\sqrt { \minus{} 4})(\sqrt { \minus{} 16}) \equal{} \sqrt {( \minus{} 4)( \minus{} 16)}$, II: $ \sqrt {( \minus{} 4)( \minus{} 16)} \equal{} \sqrt {64}$, and $ \sqrt {64} \equal{} 8$.  Of these the following are [u]incorrect[/u].

$ \textbf{(A)}\ \text{none} \qquad \textbf{(B)}\ \text{I only} \qquad \textbf{(C)}\ \text{II only} \qquad \textbf{(D)}\ \text{III only} \qquad \textbf{(E)}\ \text{I and III only}$
1. **Evaluate Statement I:**
   \[
   (\sqrt{-4})(\sqrt{-16}) = (2i)(4i) = 8i^2 = 8(-1) = -8
   \]
   On the other hand,
   \[
   \sqrt{(-4)(-16)} = \sqrt{64} = 8
   \]
   Therefore, 
   \[
   (\sqrt{-4})(\sqrt{-16}) \neq \sqrt{(-4)(-16)}
   \]
   Hence, Statement I is incorrect.

2. **Evaluate Statement II:**
   \[
   \sqrt{(-4)(-16)} = \sqrt{64} = 8
   \]
   This statement is correct.

3. **Evaluate Statement III:**
   \[
   \sqrt{64} = 8
   \]
   This statement is obviously correct.

Since Statement I is incorrect and Statements II and III are correct, the only incorrect statement is I.

The final answer is \(\boxed{B}\)