A shipping department is reporting that a laser printer in the receiving area is becoming jammed because the printer attempts to pull several sheets of paper for each print. Which of the following may be the cause？（）

• A、Humidity is causing the paper to stick together.
• B、The paper is sticking to the corona wire and causing the jam.
• C、A4 paper is being used and may not be supported by laser printers.
• D、The fusion roller is dirty and pulling too many sheets of paper.