One Disadvantage of the Pre-1914 Gold Standard Was That

One disadvantage of the pre-1914 gold standard was that:

A) slow expansion of the world's gold stock led to too much inflation in the prices of products other than gold.
B) internal prices of economies being rigid, there arose uncertainty in the international trade.
C) pressures to adjust were placed mainly on countries in payments deficit situations, and not on countries in surplus.
D) central banks often changed their announced gold prices to achieve competitive devaluations.