Option a. Positive, negative.
Step-by-step explanation:
As we know for any point on a graph abscissa  is known as x-coordinate and ordinate is known as ordinate.
(1) Â For 1st quadrant abscissa and ordinates are positive.
(2) For 2nd quadrant abscissa is negative and ordinates are positive.
(3) Â For 3rd quadrant abscissa and ordinates both are negative.
(4) Â For 4th quadrant abscissa is positive and ordinate is negative.
Point C has a Positive abscissa and a negative ordinate.
Therefore, Option (A) is the answer.