Every process has at least one thread, and sometimes more than one. What advantage is there to spawning a thread versus a sub-process?

a. Threads are independently executable whereas processes are not

b. Individual threads do not require the overhead associated with a process control block

c. Processes may be further sub-divided into child processes, but threads may not

d. there is no advantage

Virtual memory memory increases the apparent amount of memory by ___

		installing more physical RAM
		Using faster SRAM in place of slower DRAM
		increasing hard drive size
		using hard drive space for temporary storage of files