TWD MPs are considered to be what in their existing form?

TWD MPs are considered fully usable in their existing form because they meet the defined standards and requirements necessary for operational implementation. This implies that they are functional, reliable, and ready for use without the need for significant modifications or updates. A designation of full usability indicates that these materials have been thoroughly vetted and deemed suitable for current practices or applications.

In contrast, the other choices suggest varying degrees of limitations or concerns regarding the usability of the TWD MPs. For instance, "partially usable" would imply that while some elements may be useful, others are not, which doesn't reflect the complete usability asserted in the correct answer. "Outdated" suggests that the materials are no longer relevant or effective in their intended context, and "under review" indicates that they are in a process of evaluation that might limit their immediate applicability. Therefore, identifying TWD MPs as fully usable underscores their readiness for current use and effective contribution to the tasks they are designed for.