A 70-year-old female patient has just been diagnosed with Alzheimer's disease. Which of the following drug is used for the treatment of Alzheimer's disease?

A. Bethanechol (Urecholine) Bethanechol is a cholinergic agonist used to treat urinary retention. It is not indicated for Alzheimer's disease. B. Albuterol (Proventil) Albuterol is a bronchodilator used to treat respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD). It is not indicated for Alzheimer's disease. C. Rivastigmine Rivastigmine is a medication commonly used for the treatment of Alzheimer's disease. It belongs to a class of drugs called cholinesterase inhibitors, which work by increasing the levels of acetylcholine in the brain. This can help improve cognitive function in individuals with Alzheimer's disease. D. Edrophonium (Enlon) Edrophonium is a medication used for the diagnostic evaluation of Myasthenia Gravis. It is not used in the treatment of Alzheimer's disease.