The Producer Price Index Is Regarded as a Warning Sign

The producer price index is regarded as a warning sign of inflation because:

A) prices of inputs will ultimately be reflected in prices of final products.
B) prices of inputs will ultimately be reflected in prices of final products
C) producers are likely to have monopoly control over prices.
D) producers are likely to have monopoly control over prices
E) consumers have to pay the prices charged
F) consumers have to pay the prices charged.
G) commodity producers can sell whatever they want at higher prices
H) commodity producers can sell whatever they want at higher prices.