In the scenario described, which ONE of the following test-environment attributes is missing?
A properly designed test environment must be restorable — capable of being returned to a known, consistent baseline state after each test run or between test cycles — so that subsequent tests, including regression checks and defect-fix verification, start from reproducible conditions. When an environment lacks a reliable mechanism (such as snapshots, backups, or a reset procedure) to revert configuration and data changes introduced during testing, results become inconsistent and defects become hard to reproduce or confirm as fixed, which is precisely the gap the restorable attribute is meant to cover.
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