The question is asking to choose among the following choices that state what would the domain in an email represents, base on my research, I would say that the answer would be letter B. location of the destination. I hope you are satisfied with my answer and feel free to ask for more
What help menu are you talking about?
Change is what is left over
ex. the cashier tells you "here is your leftover change sir/ma'am "<span />
when using a dark background for presentations you should use bright colors to contrast with it
this makes the informations much easier to see and read for example white text on black background