Answer: A: Layers
Explanation: It is correct on PLATO
I believe that the answer you are looking for is a Web Server.
Aloha~. My name is Zalgo and I am here to be of assistance with your problem. The answer to your question is D. The minimum amount of gas you can leave in your vehicle is 1/4 Full or 3/4 Empty. The most amount you will need is quite close to when your gas tank is full (so 1/4 Empty or 3/4 Full).
Hope this helps.
"Stay Brainly and stay proud!" - Zalgo