Explanation

Ashokan inscriptions in Afghanistan — notably the Kandahar Bilingual Rock Inscription and the Kandahar Greek Edicts — are written in Greek and Aramaic (Greek-Aramaic), reflecting the Hellenistic and Aramaic-speaking population of the former Seleucid territories. This is distinct from the Brahmi script used for edicts across most of the subcontinent and the Kharoshthi script used in the north-west (e.g., Shahbazgarhi and Mansehra in present-day Pakistan). Sharada (option B) is a much later script of Kashmir, unrelated to Ashoka. Hence option D.