Both the X and Y Coordinates of a Point Execute

Multiple Choice

Both the x and y coordinates of a point execute simple harmonic motion.The result might be a circular orbit if:

A) the amplitudes are the same but the frequencies are different
B) the amplitudes and frequencies are both the same
C) the amplitudes and frequencies are both different
D) the phase constants are the same but the amplitudes are different
E) the amplitudes and the phase constants are both different