The correct answer is: A. Laser printer
A laser printer is a type of computer printer that uses a laser beam to produce an image on a drum. The image is then transferred to paper using a toner cartridge. Laser printers are known for their high quality output and speed.
A dot-matrix printer is a type of computer printer that prints text and images by using a series of dots. The dots are created by a print head that moves across the page, striking an inked ribbon against the paper. Dot-matrix printers are relatively inexpensive and can print on a variety of paper types. However, they are not as high quality as laser printers and can be noisy.
A thermal printer is a type of computer printer that uses heat to create an image on paper. The image is created by a print head that contains a series of heating elements. The heating elements are turned on and off to create dots on the paper. Thermal printers are often used in point-of-sale systems and for printing receipts.
An inkjet printer is a type of computer printer that uses ink to create an image on paper. The ink is sprayed onto the paper from a series of tiny nozzles. Inkjet printers are relatively inexpensive and can print on a variety of paper types. However, they can be expensive to operate, as the ink cartridges can be costly.
Therefore, the only option that is a page-at-a-time printer is a laser printer.