A company's market share went from 50 to 65 percent of the total market.

Of the following choices, which two statements about the company's market shares are true?

• a.)
• Market shares rose by 30 percentage points.
• b.)
• There was a 23% increase in market shares.
• c.)
• Market shares rose by 23 percentage points.
• d.)
• There was a 15% increase in market shares.
• e.)
• Market shares rose by 15 percentage points.
• f.)
• There was a 30% increase in market shares.