Which one of the following statements about points in different quadrants of the Cartesian plane is correct?
a) In Quadrant III, abscissa is positive while ordinate is negative.
b) In Quadrant I, abscissa is negative while ordinate is positive.
c) In Quadrant II, abscissa is negative while ordinate is positive.
d) In Quadrant II, abscissa is positive while ordinate is negative.