The Union's capture of Port Hudson and the surrender at Vicksburg in July 1863 effectively divided the Confederacy geographically and strategically. The most accurate answer that reflects the impact of these events on the Confederacy is:
2. The Confederacy could no longer get supplies from its western states.
This division created a significant logistical challenge for the Confederacy, as both Vicksburg and Port Hudson were key points along the Mississippi River. With control over these areas, the Union effectively isolated Texas, Louisiana, and Arkansas from the other Confederate states, disrupting supply lines and making it difficult for the Confederacy to receive resources from the western states.