Sven Likes to Water Ski, but Can Only Water Ski

Sven likes to water ski, but can only water ski during the one week each year when he is on vacation. Therefore, he plans to ski every day, for eight hours a day. The first day, Sven skied for eight hours and enjoyed every hour. The second day, Sven slept in and then skied for seven hours, which was fun but not as much fun as the first day. The third day, Sven skied for six hours, but was starting to get a bit bored by the end. The fourth day, Sven skied for four hours and then took a nap. On the fifth day of Sven's vacation, Sven went blueberry picking all day. On the fifth day of Sven's vacation, he had decided that another hour of skiing would yield:

A) more utility than blueberry picking.
B) the same level of utility as the day before.
C) less utility than blueberry picking.
D) no utility at all.