wants to redesign the user interface. The customer service agents use to enter explicit statement to invoke operations within the system and cannot always remember the commands.

The correct answer to use in filling in the gap is "Command languages interaction".

Explanation:

Command languages interaction occurs when the user enters command which are not always remembered, the computer executes it (with feedback if necessary), then requests next command.

This implies that under command languages interaction, "Command prompts" are employed by users who enter in commands and maybe certain parameters that impact how the command is executed.

Therefore, the correct answer to use in filling in the gap is "Command languages interaction".

the best answer i can give you is to ask a friend to trade you 25$ for the card and take that on a prepaid card, or where ever you   got it from return it for 25$ and like i said a prepaid card or put it on your bank card if you have one. with currency there is not much to do but if its digital it can always be converted.   hope this .