Final answer:
The limit of the difference quotient is 'Derivative at the point'. The derivative at a point gives the instantaneous rate of change or the slope of the tangent line to the curve at that point.
Step-by-step explanation:
The limit of the difference quotient is C) Derivative at the point. The difference quotient represents the rate of change of a function as the difference between two points on the function approaches zero. The derivative at a point gives the instantaneous rate of change or the slope of the tangent line to the curve at that point.