Read the following context and choose the best option to answer the question.
Context: Hello ! I was walking at a rate of 4.5 mph and jogging at a rate of 6.0 mph . My treadmill noted about 2 miles for the first week workouts and around 300 calories . When I did the workout on the track I had no idea of the calories .
Question: Why was she interested in the calorie count ?
Options: 
A. She thought the first week workouts would provide more calories .
B. She was working on a treadmill .
C. She thought jogging would burn more calories .
D. She was trying to loose weight .


D