About 20 Years Ago, Sturdy Light, Inc

About 20 years ago, Sturdy Light, Inc., produced a sturdy, lightweight backpack in a market that was rapidly growing. Sturdy Light became a leader in this market. Eventually, the backpack market reached the maturity stage and slowed down. However, by this time, Sturdy Light had developed a strong brand name and continued to steadily lead the market. Which of the following describes this scenario?

A) Sturdy Light was a star that developed into a cash cow.
B) Sturdy Light was a question mark that developed into a star.
C) Sturdy Light was a dog that developed into a question mark.
D) Sturdy Light was a cash cow that developed into a star.