Which development most led to changes 8n the level of presidential power during the 20th century

The expanded use of executive actions to combat economic crises

one of the negative side effects were the economic losses the events of september 11th caused. many, many people lost their jobs as a result of a downturn in the economy after the terrorist attacks.

food and resources were plentiful.

women were encouraged to marry later in life so they could work in factories.