Each time you save a document, you will need to type in the file type in which it should be saved you can select the save button to save it with the same file name if it has been previously saved you will need to select the location to save the file you will need to use the save as dialog box

The best answer is B: you can select the Save button to save it with the same file name if it has been previously saved

This answer depends on whether or not the document has initially been saved. If it has, then clicking the save button every time will save the file with its current name. Clicking the save as button each time will only let you save the file with a new name and an option to save it in a new location.

system programmer option d is correct

because an operating system is software that manages computer hardware and system resources.