How would a woman at an airport staring out of a window at an airplane know that the plane she is watching was moving?
A. She could use the plane as a reference point.
B. She could use the building behind the plane as a reference point.
C. She could use the clouds in the sky as a reference point.
D. She could use other moving planes as reference, points.
Is the answer B?
Thank you.
1 answer
yes.