The part of the computer that contains the brain, or central processing unit, is also known as the

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.).

Hope that helps                                                  : )

replace   c   with   a   and simplify.

a = c , b = a, q = n , 2 , a = c , 900 b= a , 700 , q = n , 600 , 2 = b o t h , b = a , q = n