The correct answer is: A. MEM /P
MEM /P is a command-line utility that displays the amount of memory available on your computer, as well as the load order of all TSRs and device drivers.
MEMMAKER is a memory-management utility that can be used to optimize the use of memory on your computer.
MEM /C is a command-line utility that displays the amount of memory available on your computer, as well as the total amount of memory that is being used.
SYS: is the root directory of your system disk.
None of the above options will display the current load order of TSRs.