If You Hear That Unemployment Increased by 2 Percentage Points

If you hear that unemployment increased by 2 percentage points to 4 %in the past year, while the labor force participation rate and the population remained constant, it means:

A) unemployment doubled in the past year.
B) there was a 100 percent increase in unemployment.
C) twice as many people are without work than was the case a year ago.
D) All of these are true.