Keynes Once Remarked That, in the Long Run, We're All

Keynes once remarked that, in the long run, we're all dead. He was responding to the conventional wisdom of classical economics who argued that:

A) the supply curve should remain vertical in the long run.
B) World War I was fought to free Britain from economic ruin.
C) depression was only a short-run, temporary departure from full-employment equilibrium.
D) funeral plots need to be determined by the market.
E) market-based realities cause the estate tax to be too high.