The correct answer is: A. Copy temp.doc to a:
To copy a file from one drive to another, you can use the copy command. The syntax for the copy command is:
copy source destination
In this case, the source is the file temp.doc on drive C:, and the destination is drive A:. So, the command to copy the file is:
copy temp.doc a:
Option B. Copy c:\temp.doc a: is incorrect because it does not include the file name. The copy command requires the name of the file you want to copy.
Option C. Copy c: a: is incorrect because it does not include the name of the file you want to copy. The copy command requires the name of the file you want to copy.
Option D. Copy temp a: c: is incorrect because it copies the file temp from drive A: to drive C:. The question states that you want to copy the file from drive C: to drive A:.