HELP FAST! DUE TODAY!

What is secondary exchange ? - apex a. returning a product you are unhappy with b. buying the same product more than once c. buying from people instead of companies d. recycling a previously recycled product

Exchanging which type of data uses the least bandwidth? music photographs video voice bandwidth- the amount of data that can be moved between two points in a set time period

David is in week 3 of his current ashford course and has a paper due by monday night at midnight. he has finished everything but the concluding paragraph. as he boots up his computer to work on it, he sees a flash across the screen and then the screen goes black. he begins to panic as he tries desperately to turn the laptop back on. david should have saved his work on what kind of portable device?