Finish the following sentence with the best choice: How does a dial test indicator work?

Choices:
- A test indicator measures the deflection of the arm, the probe does not retract but swings in a figure eight around its hinge point.
- A test indicator measures the deflection of the arm, the probe does not retract but swings in an arc around its hinge point.

Answer:
A test indicator measures the deflection of the arm, the probe does not retract but swings in an arc around its hinge point.