Which of the following was the result on appeal in Spirit Airlines Inc., v. Northwest Airlines Inc., the case in the text in which Spirit Airlines claimed that Northwest Airlines lowered its prices on certain flights once Spirit Airlines began to compete?

a) That although there was insufficient evidence from which to determine that the defendant was guilty of predatory pricing, a jury trial was mandated because the defendant was guilty of inequitable conduct.

b) The court ruled that there was sufficient evidence from which a jury could determine that the defendant was guilty of predatory pricing thereby entitling the plaintiff to prevail.

c) That there was insufficient evidence from which to determine that the defendant was guilty of predatory pricing and that summary judgment was therefore properly granted to it.

d) The court ruled that although there was sufficient evidence from which a jury could determine that the defendant was guilty of predatory pricing, the defendant was entitled to a summary judgment ruling in its favor because the plaintiff failed to establish that it could have succeeded in the market absent the defendant's predatory pricing.

e) That although there was insufficient evidence from which to determine that the defendant was guilty of predatory pricing, a jury trial was mandated because the defendant was guilty of attempted monopolization.