The correct answer is: B. is an output device.
A dot-matrix printer is an output device that prints text and images by striking an inked ribbon against paper. The print head contains a matrix of pins that are arranged in a vertical column. When the printer is turned on, the print head moves across the page, striking the ribbon and paper at the appropriate locations to form characters.
Dot-matrix printers are relatively slow and noisy, but they are also relatively inexpensive. They are often used in applications where high quality printing is not required, such as printing invoices or receipts.
A. is an input device is incorrect because a dot-matrix printer is an output device. It takes data from a computer and prints it out on paper.
C. cannot print alphabet is incorrect because a dot-matrix printer can print both text and images.
D. has a speed of 1000 cps is incorrect because the speed of a dot-matrix printer varies depending on the model and the type of paper being used.
E. None of the above is incorrect because the correct answer is B.