Here is an another angle to this Q
Point1. The test- driving occurred prior to pleading. So that must be expressed in either a past perfect or some such equivalent expression that brings out that priorness
Point 2. ‘Disconnected motors’ is inferior to ‘odometers that were disconnected, because the former gives a feeling as if there is some special kind of odometers such as disconnected odometers and connected odometers.
B and D are in contention. But B suffers from using the inelegant phrase ‘disconnected odometers’.
D is a better choice for clearly bringing out that the tests had been carried out prior to pleading by marking the tests as ‘having test-driven’ and for using the more acceptable ‘ their odometers disconnected’
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