I believe the answer is B, but I'm not 100% sure. :)
A, C, and D are all correct answers, since you are taking away 4 in each of the answers. Hope this helped!
Answer:
Walmart: 1.20 divided by 3= 0.4
Sprouts: 1.35 divided by 5= 0.27
Sprouts has a better deal
30. Since he can ride the bike 6 miles in 20 mins, and 100 divided by 20 is 5, the answer would be given to you by multiplying 5x6, which is 30. So he can travel 30 miles in 100 minutes.