In 2007,Angel Foods Produced 300,000 Bags of Tortilla Chips,employing 12,000

In 2007,Angel Foods produced 300,000 bags of tortilla chips,employing 12,000 hours of labor.In 2008,Angel Foods produced 325,000 bags of tortilla chips,employing 13,000 hours of labor.Relative to their productivity in 2007,their productivity in 2008

A) decreased by 2.1 percent.
B) was unchanged.
C) increased by 1.3 percent.
D) increased by 2.3 percent.