A Short- Run Average Total Cost Curve Will Touch the Long-

Multiple Choice

A short- run average total cost curve will touch the long- run average cost curve at a level of output only

A) where the short- run cost curve is downward sloping.
B) by coincidence.
C) when the quantity of the fixed factor being employed is at the optimal level for that level of output.
D) where the short- run cost curve is upward sloping.
E) where the short- run cost curve is downward- sloping and the quantity of the fixed factor is optimal.