The product of three negative integers is a negative integer.

Which of the following expression are equal to $-20?$

$$\begin{gathered} \left(I \right)-4\times 5 \\ \left(II\right) -32+10-\left(-2\right) \\ \left(III\right) -6\times 2-\left[-2\times -4\right] \\ \left(IV\right) 5\times \left(-2\right)+\left(-3\right)\times 4 \end{gathered}$$