During a Certain Year,the Consumer Price Index Increased from 120

Multiple Choice

During a certain year,the consumer price index increased from 120 to 132 and the purchasing power of a person's bank account increased by 4 percent.For that year,

A) the nominal interest rate was 6 percent.
B) the nominal interest rate was 14 percent.
C) the inflation rate was 12 percent.
D) the inflation rate was 9 percent.