The correct answer is B. A microfilm reader is a COM device.
A COM device is a computer output microfilm (COM) device that converts computer data into microfilm images. COM devices are used to create microfilm records of documents, such as invoices, purchase orders, and medical records. Microfilm records are more compact and durable than paper records, and they can be stored for longer periods of time.
An OCR device is an optical character recognition device that converts text from a scanned image into machine-readable text. OCR devices are used to digitize documents, such as books, magazines, and newspapers.
A MICR device is a magnetic ink character recognition device that reads text that has been encoded with magnetic ink. MICR devices are used to process checks and other financial documents.
D is incorrect because microfilm readers are COM devices, not OCR or MICR devices.
E is incorrect because microfilm readers are not all of the above. They are only COM devices.