The correct response regarding how the operating system (OS) makes multitasking possible is by allocating RAM to open applications.
The OS manages system resources, including RAM, CPU time, and input/output (I/O) devices, to ensure that multiple applications can run concurrently without interfering with each other. It keeps track of the state of each process, switches between them efficiently, and allocates the necessary memory for each running application, allowing users to work with multiple programs at the same time.
The other options listed (creating the FAT, sending commands to the printer, and providing a GUI) are not directly related to the core functionality of multitasking.