The first trial ended with the Scotts' case being dismissed because the slaveowner decided she would give the Scotts their freedom instead. judge refused to attend the hearing at the Saint Louis Circuit Court. C jury decided that the Scotts lacked proof that they had been enslaved. D laws changed to ban slavey across the entire United D States.

The correct answer is C. The jury decided that the Scotts lacked proof that they had been enslaved.<br /><br />In the first trial of the Dred Scott case in 1850, the jury found in favor of the defendant, Dred Scott, and ruled that he was entitled to his freedom. However, the judge overturned the jury's decision and dismissed the case, stating that the federal courts did not have jurisdiction to hear cases involving enslaved people. This decision was later upheld by the Supreme Court in the 1857 Dred Scott v. Sandford case.