[单选题]
A uniform rod of mass M and length L is -4 )tf9y fl5 lrw)cznf4x+k u9wqsy z.pivoted at one of its ends. The rod is v.8 ohvo9lv w)released from rest from the horizontal position..w8 v)olo v9vh The moment of inertia of the rod when rotating about its end is $\frac{1}{2}ML^2$.
What is the linear speed of the bottom end of the rod as it swings past the vertical position?
A. $\sqrt{\frac{3g}{L}}$
B. $\sqrt{3gL}$
C. $\sqrt{6gL}$
D. $\frac{3g}{2L}$
