Answer:
progress Bar ( B )
Step-by-step explanation:
A progress bar is a graphical control used to monitor/view the extent of an external operation in a computer like file downloads, file transfer and even installation of a computer program in the system.
The progress bar is accompanied by a text that indicates the progress of the file downloads or transfer in the form of percentages. data transfers are included/viewed in the progress bar there is no such thing as Data transfer Bar.even data transfer viewer are not used to see how fast a download is been done on a web page because they are not available on regular computers.