Which One of the Following Is Not True Concerning Cathode

Multiple Choice

Which one of the following is not true concerning cathode rays?

A) They impart a negative charge to metals exposed to them.
B) They originate from the negative electrode.
C) They are made up of electrons.
D) The characteristics of cathode rays depend on the material from which they are emitted.
E) They travel in straight lines in the absence of electric or magnetic fields.