Which of the statements is true of the long‑run industry supply curve (LRIS)? External diseconomies result in an increasing cost industry and a horizontal LRIS curve. External economies result in an increasing cost industry and a downward sloping LRIS curve. External economies result in a decreasing cost industry and a downward sloping LRIS curve. Internal diseconomies result in an increasing cost industry and an upward sloping LRIS curve.

The correct answer is External economies result in a decreasing cost industry and a downward sloping LRIS curve.

Explanation:

Solution:

From the given question stated, the best statement that sis true of the long‑run industry supply curve (LRIS) is, because of external economies of scale, a larger or bigger quantity of the product is offered at a lower price which is a decreasing/reducing cost industry with an exception to the Law of Supply),the industry supply curve is downward sloping.

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15 pounds of apples and 6 cups of flour