Hegel's view on Spirit (Geist):
1. Spirit unfolds and manifests itself in history, contradicting (A). Spirit's development is not abstract; it manifests in concrete reality.
2. (B): The struggle of Spirit to know itself and find itself is central to Hegel's dialectical process.
3. (C): Spirit's progression from potentiality to actuality reflects its development in history.
4. (D): History is the manifestation of reason or logic, unfolding through time.
Thus, the correct answers are (B, C, D).