Josie is a cross-country runner. she completed a cross-country race 8 hours ago and has been sipping water since then. when she goes to the bathroom, she notices that her urine is dark in color. this is most likely a sign of:

The scenario in which Josie who is a cross-country runner despite the fact that during the 8 hours long race has been sipping water but her urine is dark in color is a sign of inadequate hydration.
She has lost more water (because of the difficulty of the race) than she has consumed.
Proper hydration is crucial in sport.