a. 65 years old man was diagnosed with Parkinson’s disease (PD) has been prescribed the combination medication carbidopa/levodopa. Which data indicates the medication is effective? 1. The client has involuntary motion when swinging the arms. 2. The client does not display emotions when discussing the illness. 3. The client is able to walk upright without stumbling. 4. The client eats 30% to 40% of meals within 1 hour.