Find the Measure (In Radians) of a Central Angle $\theta$ , That Intercepts an Arc on a Circle with Radius

Multiple Choice

Find the measure (in radians) of a central angle, $\theta$ , that intercepts an arc on a circle with radius 3/8 mm and arc length 9/7 mm.

A) 7/ 24 radians
B) 24/ 7 radians
C) 93/ 56 radians
D) 56/ 93 radians