What Is the Wave Speed in a Brass Wire with a Radius

Multiple Choice

What is the wave speed in a brass wire with a radius of 0.500 mm stretched with a tension of 125
N? The density of brass is $8.60 \times 10 ^ { 3 } \mathrm {~kg} / \mathrm { m } ^ { 3 }$

A) 68.8 m/s
B) 100 m/s
C) 136 m/s
D) 0.121 m/s
E) 500 m/s