Which of the following is another type of brake system used in trucks

a. exhaust brake
b. friction brake
c. jake brake
d. all of the above

I'm taking a class on how to make a movie, and it offers some apps that would be in the process. the thing is, i don't have any of those ha. if you have any tips on some apps i could use, that would be awesome. i don't have an iphone, so don't suggest any apps like imovie. i know that this is a weird question, but it would be super for me. : )

Are special combinations of keys that tell a computer to perform a command. keypads multi-keys combinations shortcuts

What provides an array of buttons for quick access to commonly used commands and tools