Answer :
Final answer:
The FMCSA deems conditions like option A) Meniere's disease, Myasthenia Gravis, and Diabetic peripheral neuropathy disqualifying for drivers due to their impact on safe driving. Neurological disorders like Myotonia are also disqualifying as they can impair the driver's control of the vehicle.
Explanation:
When assessing medical fitness for drivers, the Federal Motor Carrier Safety Administration (FMCSA) considers certain neurological conditions to be disqualifying due to their potential impact on safe driving. Conditions such as Meniere's disease, which can lead to vertigo and hearing loss, option A) Myasthenia Gravis, which causes muscle weakness, and Diabetic peripheral neuropathy, which impacts sensation in the limbs and could compromise vehicle control, are among those deemed disqualifying. Disorders such as Myotonia affect muscle relaxation and can hinder the ability to perform necessary, timely movements while driving. These medical guidelines aim to ensure the safety of the driver and the public by preventing potential hazards associated with the unpredictable nature of these neurological conditions.