Answer:
Option B, the sealing tape was not removed from the toner cartridge, is the right answer.
Step-by-step explanation:
Option B, is the correct answer because in the given case the problem of blank paper arises only after installing the toner cartridge. However, there may other reasons that cause the same problem as defective laser or corona wire. But, in the given case, there is some relation between the effect and the installation of the toner cartridge. Therefore, not removing the tape form toner before its installation is the correct answer.