Which one produces the greatest amount of clean energy A. burning oil
B. nuclear fission
C. nuclear fusion
D. burning coal

Nuclear Fusion is the cleanest.

Step-by-step explanation:

The following advantages make fusion worth pursuing. Abundant energy: Fusing atoms together in a controlled way releases nearly four million times more energy than a chemical reaction such as the burning of coal, oil or gas and four times as much as nuclear fission reactions (at equal mass).

i assume that by 5 you mean 5 gallons.

(20)(0.25) = 15

removing 15 gallons reduces the tank from 20 to 5.

you divide the cost ($15) by the quantity (6) to get your questions answer. the yo-yo costs $2.50. hope this : )!

step-by-step explanation: