JAMB - Commerce (2023 - No. 12)
The type of letters that are delivered through the normal mail or by airmail express service is referred to as
express letters
registered letters
inland letters
airmail letters
Explicação
The type of letters that are delivered through the normal mail or by airmail express service is referred to as inland letters. Inland letters are letters that are sent within the same country. They can be delivered through the normal mail service or by airmail express service, depending on the sender's preference and the urgency of the letter.