Scenario coherence refers to ensuring that the combination of market shocks within a stress scenario makes economic, mathematical, and logical sense. Option A describes a scenario where the USD, EUR, and JPY—the three most dominant global currencies—all depreciate simultaneously against a 'basket of world currencies'. Because these three currencies constitute the vast majority of any globally representative basket, it is highly implausible (or mathematically impossible, depending on the basket weightings) for all three to dramatically lose value against the smaller remainder of the basket at the same time. This presents the greatest cause for concern regarding coherence. Options B, C, and D are all economically coherent: B reflects an expected supply/demand correlation shock; C represents a classic 'flight to quality' where credit spreads widen and risk-free rates fall; D reflects standard central bank inflation-targeting policy.