This question has options. Answer the question about text:

My training plan has the longest run at 10miles , which is a distance I have never acheived . In fact , my longest run was 8 miles and that was last summer when I was running a lot more than I am now . But the best part about my training program is that it is starting me out slow and with a few miles and working my way up slowly .

Why do I use a training program for running now ?
OPTIONS:
(A). To make me spend more time in the activity .
(B). To get me to run as much as last summer .
(C). To let me jog slowly for miles .
(D). To guide me gradually to reach my goal .
(D).