Which Statement Is True

Which statement is true?

A) In an increasing-cost industry, a firm's long-run supply curve is perfectly elastic at the minimum of ATC and the long-run industry supply curve is upward sloping.
B) In an increasing-cost industry, a firm's long-run supply curve is upward sloping and the long run industry supply curve is also upward sloping.
C) In a decreasing-cost industry, a firm's long-run supply curve is upward sloping and the long-run industry supply curve is perfectly elastic at the minimum of ATC.
D) In an increasing-cost industry, a firm's long-run supply curve is upward sloping and the long-run industry supply curve can either be perfectly elastic or upward sloping, depending on the circumstances.
E) None of the above.