Final answer:
Viggo, who has presbyopia, struggles with seeing close objects due to the natural aging process of the eye, which leads to the eye's lens becoming less elastic.
Step-by-step explanation:
Presbyopia is a common vision problem associated with aging, where the eye gradually loses its ability to focus on close objects. Specifically, Viggo, who has presbyopia, would have difficulty seeing close objects. This condition is a result of the lens becoming less elastic with age, making it challenging to focus on small details or fine print that are near. Most individuals with presbyopia use corrective lenses, typically convex lenses, to improve their near vision. Therefore, the correct answer to the question is that Viggo has difficulty seeing c) Close objects.