What items may be shipped as FCMI?

The correct choice pertains to the specific categories of items that can be sent as First-Class Mail International (FCMI), which primarily includes lightweight items. Flats, postcards, and printed matter are suitable for this service because they fall within the guidelines established for FCMI, allowing for efficient and economical international shipping. FCMI is designed to handle items that meet the weight and dimensional restrictions, making flats and postcards ideal candidates as they can be processed quickly due to their standardized sizes.

In contrast, the other options represent types of items that do not fit within the FCMI category, as they either exceed mailing size or weight limits, or are categorized differently under international shipping services. Understanding these parameters is crucial for properly utilizing FCMI and ensuring compliance with postal regulations.