Correct Answer. B. Decrease the baud rate on the fax machine Decreasing the baud rate can improve the reliability of the fax transmission, particularly over poor quality phone lines, which can be a cause of incomplete faxes.
Option A is incorrect. Increasing the baud rate might worsen the issue if the phone line quality is poor.
Option C is incorrect. Resetting the machine may revert settings, but it won't specifically address issues related to transmission errors.
Option D is incorrect. Replacing the phone cord is advisable if physical damage is evident, but it does not directly relate to the transmission rate issues.