Which of the following relationships between short-run curves holds most accurately?

The short-run AVC exceeds the short-run ATC at any given level of output.b. If the short-run ATC curve is rising, the short-run AVC curve is declining.c. The short-run AFC is always falling with increased output, whether the short-run MC curve is greater or less than short-run AFC.d. If short- run MC is less than short-run AVC, short-run AVC is rising.