What was the primary objective of the TV-D1 (Test Vehicle Development Flight 1) test, a key milestone in India's Gaganyaan human spaceflight programme?

1. ATo test the spacecraft's lunar landing capability.
2. BTo demonstrate the performance of the Crew Escape System.
3. CTo place a satellite into a geosynchronous orbit.
4. DTo test the heat shield's performance during a full orbital re-entry.