The correct answer is A. Clean the feed rollers.
According to CompTIA A+ Core 1 220-1201 objectives under Printers:
* Frequent paper jams, particularly in high-use shared printers, are commonly caused by dirty or worn feed rollers.
* Cleaning the feed rollers removes dust, paper debris, and toner residue that can prevent smooth paper feeding, especially when printing double-sided documents.
* This is a standard preventive maintenance procedure that improves reliability and extends the printer's operational life.
Why the other options are incorrect:
* B. Use a different paper weight: A4 standard paper is appropriate; changing paper weight is unnecessary unless the paper is damaged or incompatible.
* C. Replace the fuser unit: Fuser problems generally cause smudging or incomplete fusing, not frequent paper jams.
* D. Change the toner cartridge: Toner issues affect print quality (light or streaky prints), not paper feeding or jamming.
References:
CompTIA A+ Core 1 (220-1201) Exam Objectives - Printers: "Given a scenario, troubleshoot common printer problems including paper jams, feed issues, and maintenance tasks." Mike Meyers' CompTIA A+ Certification Guide, 13th Edition, Chapter on Printer Troubleshooting and Maintenance.