【单选题】In this circuit, the diode is ideal diode(forward voltage is 0). If input voltage ui is sinusoidal wave, when ui>0, uo=__________. When ui<0, uo=_______. This circuit is called _____________ circuit.
A.
0, ui, half-wave rectification.
B.
ui, ui, half-wave rectification.
C.
ui, 0, half-wave rectifivation
D.
ui, 0, full-wave rectifivation