By what year did Cordoba come under Muslim control

Caliphate of Córdoba, Muslim state that existed in Spain from January 16, 929, when ʿAbd al-Raḥmān III assumed the supreme title of caliph, to 1031, when the puppet ruler Hishām III was deposed by his viziers and the caliphate disintegrated into the so-called kingdoms of the taifa.

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i'm pretty sure the answer is a

answer; procedural justice;