Final answer:
The nurse is checking for manifestations of untreated cataracts, which commonly include difficulty driving at night due to the decreased vision from the clouding of the eye's lens. The correct option is difficulty with driving a car at night (option a).
Step-by-step explanation:
The nurse is checking the client for associated manifestations of untreated cataracts. Cataracts are a clouding of the lens in the eye that leads to a decrease in vision. One of the common symptoms associated with cataracts is difficulty with driving a car at night due to the decreased light reaching the retina, making it hard to see in low light conditions.
Other symptoms commonly associated with cataracts include blurred vision, seeing double, sensitivity to light, seeing 'halos' around lights, and fading or yellowing of colors. Therefore, the correct associated manifestation that the nurse should check in a client with a history of untreated cataracts is difficulty with driving a car at night (option a).