Which of the Following Is True About a Diode?
A)A $\degree$

Which of the following is true about a diode?

A) A diode causes the voltage to shift in phase by 90 $\degree$ , i.e., a right angle.
B) A diode has high resistance in one current direction and low resistance in the opposite current direction.
C) A diode can only be used with a transformer.
D) All filter circuits contain a diode.
E) All of the above.