John Maynard Keynes Observed That During Rare Times of Deep

John Maynard Keynes observed that during rare times of deep financial and economic crisis,when the "invisible hand" has temporarily ceased to function,

A) there is a more urgent need for government to play an active role in restoring markets to their healthy function.
B) government should avoid intervening in the market and wait patiently for proper market function to return.
C) economists need to re-evaluate all of their basic principles.
D) the economy can rely on entrepreneurs to take creative actions to end the crisis.