Which of the Following Statements Regarding the Learning Curve and Economies

Which of the following statements regarding the learning curve and economies of scale is accurate?

A) Just as diseconomies of scale are presumed to exist if a firm gets too large, there is a corresponding increase in costs in the learning-curve model as the cumulative volume of production grows.
B) Where diseconomies of scale are presumed to exist if a firm gets too large, there is no corresponding increase in costs in the learning-curve model as the cumulative volume of production grows.
C) Where diseconomies of scale are presumed to exist if a firm gets too small, there is no corresponding increase in costs in the learning-curve model as the cumulative volume of production grows.
D) Just as diseconomies of scale are presumed to exist if a firm gets too small, there is a corresponding increase in costs in the learning-curve model as the cumulative volume of production grows.