A Bode magnitude plot for the transfer function $G(s)$ of a plant is shown in the figure. Which one of the following transfer functions best describes the plant?
1. $\frac{1000(s+10)}{s+1000}$
2. $\frac{10(s+10)}{s(s+1000)}$
3. $\frac{s+1000}{10s(s+10)}$
4. $\frac{s+1000}{10(s+10)}$