Which of the following statements is true regarding color flow Doppler?
A. color flow is a continuous wave ultrasound technique that is subject to aliasing artifact
B. color flow is a pulsed ultrasound technique that is not subject to aliasing artifact
C. color flow is a continuous wave ultrasound technique that is not subject to aliasing artifact
D. color flow is a pulsed ultrasound technique that is subject to aliasing artifact
