Which class of domestic mail should you use for a ten-pound package if delivery in three days or less is not necessary?

• A. Priority mail
• B. First-class mail
• C. Parcel post
• D. Express mail

Answer: (C)

Using Parcel Post, also known as Retail Ground service, is a sensible choice for sending a ten-pound package when expedited delivery is not a priority. This class of mail is designed for shipping heavier items that do not require quick delivery and is more economical compared to other options, making it ideal for non-urgent packages.

Priority Mail is a faster option, typically providing delivery within one to three days, which is unnecessary if speed isn't a concern. First-class mail primarily handles letters and lightweight packages, generally limited to items weighing up to 13 ounces, so it wouldn’t be suitable for a ten-pound package. Express Mail provides the quickest service—overnight delivery— which also does not align with the need for non-urgent shipment. Thus, Parcel Post is the best choice under these circumstances.