In 1976, the Cost of a Movie Was $4

In 1976, the cost of a movie was $4. In 2012, it's $9. If the CPI for 1976 is 56, and 228 for 2012, then we could say the cost of a 1976 movie in 2012 would be:

A) $16.29, so the cost of movies has not increased as much as general inflation.
B) $16.29, so the cost of movies is relatively more in 2012 than it was in 1976.
C) $2.21, so the cost of movies has not increased as much as general inflation.
D) $2.21, so the cost of movies is relatively more in 2012 than it was in 1976.