With reference to the computers, which of the following statements are correct?

A. CPU follows fetch - decode - execute - store cycle to run instructions.

B. Intel and AMD are two manufactures of CPUs

C. The clock speed of a CPU is usually measured in Megabytes

D. Fans are required to cool down most CPUs so that they do not overheat

E. CPU is the brain of the computers and modern CPUs cannot have multiple processing cores.

Choose the correct answer from the options given below: