What Is the Difference Between Deflation and Disinflation

What is the difference between deflation and disinflation?

A) Deflation is used in microeconomics, whereas disinflation is used in macroeconomics.
B) Deflation refers to changes in expected inflation, while disinflation refers to changes in the actual rate of inflation.
C) Deflation refers to a decrease in the overall price level, or negative inflation, while disinflation simply refers to a decrease in the inflation rate.
D) There is no difference between these two concepts; they are synonyms.