Apple Introduced Its IPhone 3G in July 2008 and Within

Multiple Choice

Apple introduced its iPhone 3G in July 2008 and within a month sales had topped 3 million units.By April 2009, more than 25,000 apps for the iPhone 3G were available in the iTunes store, an indication that in a competitive market,

A) the ease at which a new firm can enter a competitive market is low.
B) the ease at which a new firm can enter a competitive market is high.
C) entry into the market is blocked.
D) entry into the market is restricted in the short run, but becomes easier in the long run.