Apple Launched the IPhone in 2007, and Unit Sales Reached

Multiple Choice

Apple launched the iPhone in 2007, and unit sales reached an astonishing 47.7 percent market share in the smartphone industry by 2015. The global smartphone market is expected to grow at an annual rate of 9.8 percent through 2018 due to the growth in China and other markets. Currently, Apple's iPhone SBU appears to be a

A) question mark.
B) star.
C) hedgehog.
D) cash cow.
E) dog.