What Problem Is Faced by Multicore Processors Running Older Software

Multiple Choice

What problem is faced by multicore processors running older software written for single-brain chips?

A) Multicore processors usually run older software by using only one core at a time.
B) Multicore processors draw more power than single-brain processors to solve the same problem.
C) Multicore processors require greater cooling to run the same software as single-brain processors.
D) Individual cores in multicore processors have smaller memories than single-brain chips and are consequently slower.
E) Multicore processors still have some fair distance to go before going mainstream.