The figure shows the developing zone and the fully developed region in a pipe flow where the steady flow takes place from left to right. The wall shear stress in the sections $\mathrm{A}, \mathrm{B}, \mathrm{C}$, and $\mathrm{D}$ are given by $\tau_{A}, \tau_{B}, \tau_{C}$, and $\tau_{D}$, respectively. Select the correct statement.
- $\tau_{A}>\tau_{B}$
- $\tau_{B}>\tau_{A}$
- $\tau_{C}>\tau_{B}$
- $\tau_{C}>\tau_{D}$
