Which of the following is the appropriate description of the clock frequency of a PC?
a) The clock frequency of the CPU need not have the same value as the clock frequency of the system bus connected to the main memory.
b) The inverse of the clock frequency of the CPU represents the number of instructions which can be executed per second.
c) If the clock frequency of the CPU is increased by a factor of 2, 3, 4, etc., the overall system performance is also increased proportionally by a factor of 2, 3, 4, etc.
d) If two PCs use CPUs of the same type and of the same clock frequency, one can safely conclude that they have the same performance as executing programs on two PCs