$\mathrm{A} C D$ Has a Diameter Of $12.0 \mathrm{~cm}$ If The Has

Multiple Choice

$\mathrm{A} C D$ has a diameter of $12.0 \mathrm{~cm}$ . If the $\mathrm{CD}$ is rotating at a constant frequency of 4.00 rotations per second, then the linear speed of a point on the circumference is

A) $1.31 \mathrm{~m} / \mathrm{s}$ .
B) $2.00 \mathrm{~m} / \mathrm{s}$ .
C) $1.51 \mathrm{~m} / \mathrm{s}$ .
D) $1.25 \mathrm{~m} / \mathrm{s}$ .
E) $1.82 \mathrm{~m} / \mathrm{s}$