Courtney Goes for an Hour Bike Ride Which Yields a Marginal

Courtney goes for an hour bike ride which yields a marginal utility of 8.She stops and gets an ice cream cone,and then rides her bike for another hour.We can say:

A) the utility gained from a second ice cream cone was more than a second hour of bike riding.
B) the utility gained from the ice cream was more than 8.
C) the utility gained from the ice cream was less than the second hour of bike riding.
D) the utility gained from a third hour of biking would be less than the utility gained from the one ice cream.