Central Processing Unit (CPU.). Is the brain or the heart of a computer. Is also known as Microprocessor and Consist of three (3) Units:
A): Control Unit (CU)
B): Arithmetic Logic Unit ( ALU)
C): Main Memory Unit ( MMU)
Therefore, Your Answer ====> Microprocessor, or The System Unit contains the Central Processing Unit (CPU.).
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I think it is D. Social reform activities during the Second Great Awakening
Many North African nations practice Islam because many Muslims traded in that region, so the North Africans converted to Islam, whereas those in Sub-Saharan African nations were more prone to Christianity because of the trade they did with Europeans.
It should be A. craft union.