What Do Economists Think About High and Moderate Inflation

What do economists think about high and moderate inflation?

A) They agree that neither high inflation nor moderate inflation is very costly.
B) They agree that both high and moderate inflation are quite costly
C) They agree that high inflation is costly, but they disagree about the costs of moderate inflation.
D) They agree that moderate inflation is as costly as high inflation, but they disagree about how to determine the costs of inflation.