An older adult has encouraged her husband to visit their primary care provider, stating that she is concerned that he may have Parkinson's disease. Which of the wife's descriptions of her husband's health and function is most suggestive of Parkinson's disease?A)"Lately he seems to move far more slowly than he ever has in the past."B)"He often complains that his joints are terribly stiff when he wakes up in the morning."C)"He's forgotten the names of some people that we've known for years."D)"He's losing weight even though he has a ravenous appetite."