Which Statement About Stellar Motion Is Incorrect

Multiple Choice

Which statement about stellar motion is incorrect?

A) In general, the closer a star is, the more its proper motion.
B) The radial velocity is measured by the Doppler shift.
C) The transverse velocity is measured by the proper motion and the distance.
D) Like parallax, proper motion is measured over intervals of exactly six months.
E) The Pythagorean theorem relates space, transverse, and radial velocities.