An older adult with suspected Parkinson's disease has a "challenge test" performed in order to confirm the diagnosis. The nurse understands that a "challenge test" will demonstrate which of the following?

Dramatic improvement in tremor only after administration of levodopa

Dramatic improvement in gait only after administration of levodopa

Immediate reversal of all symptoms of Parkinson's disease after administration of levodopa

Dramatic improvement of symptoms of Parkinson's disease after administration of levodopа