The answer would be C- 3:4
I just did the quiz but to break it down.
Point A is located at 0, point D is at 15 so that's 0/15
Now point E is at 20, while I being at 40 making is 20/40
Put that in your calculator or online equation solver and you'll end with 3:4
3;4 is the ratio of ad to ei
c cuz ad is 15 and ei is 20, devided those both by five and you get 3 and 4
10:40 -> 1:4