Which of the following describes a company that has delivered above$-$average returns to its investors?

a$.$ A biotech firm that recently announced it has received FDA approval for its new orphan drug to treat a rare heart condition and will be able to sell the treatment for $$10,000$ per year per patient beginning in the fall

b$.$ A retail company that announced it saw growth in same$-$store sales from last year to this year and will open $250$ new stores to capitalize on its growing popularity

c$.$ An airline that reported weaker$-$than$-$projected earnings this year because of increased maintenance costs for its aging fleet of planes

d$.$ A tool manufacturer that announced it will increase its dividend payment$$the highest dividend amongst all of its industry competitors$$for the upcoming quarter due to market share gains in overseas markets