What is the principal rhetorical force of mā al-qāriʿah?

Supplementary Practice 26 — Comparative Rhetoric of Sūrat al-Qāriʿah and Sūrat al-Tīn

• Expressing explicit permission
• Omitting an answer to a condition
• Magnification and awe, not merely ordinary information-seeking
• Putting a verb into the jussive