Sit on the Floor with Your Legs Straight Out, Raise

Multiple Choice

Sit on the floor with your legs straight out, raise your straight arm out with your thumb up such that your thumb aligns with one of your big toes, rapidly blink your left and right eye, and observe how your big toe appears to shift positions. This demonstration is an example of _________________.

A) Newton's first law
B) uniform circular motion
C) parallax
D) retrograde motion