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Choose the incorrect statement about microcomputers? ...

Choose the incorrect statement about microcomputers? 

A.

A microcomputer can be placed on a single silicon chip

B.

A microcomputer can have more processing capability than a mainframe model

C.

ROM chips may be used in micros to permanently store program instruction

D.

Most micros use rigid disk storage devices rather than floppy disk drives

Correct answer is D

No explanation has been provided for this answer.