Concept:A writ of mandamus is a court order that compels a public body or lower court to perform a legal duty.
Explanation:The question describes an order that forces a lower court or public corporation to act in accordance with the law.
Mandamus is the appropriate legal remedy for such a situation.
It is issued when an official or body fails to perform a duty required by law.
The writ does not grant new powers; it only enforces existing statutory obligations.
The "great writ" refers to habeas corpus, which concerns unlawful detention, not compelling performance of duty.
Therefore, the option that matches this order is the writ of mandamus.
Answer:A. the writ of mandamus