Answer:
The correct answer is option d.
Step-by-step explanation:
Starting from steady-state, a permanent increase in the rate of depreciation in the Solow model causes the growth rate of output to fall temporarily and the level of GDP to fall permanently.
An increase in the depreciation rate will cause the depreciation curve to shift upwards. This upward movement in the depreciation curve will further result in a new lower steady state.
The growth rate of output thus will rapidly be negative at first and then converge to zero as it approaches a steady state. The level of GDP will thus fall permanently.