Read the passage. Under Harun's rule, Baghdad became the most glittering and advanced city in the Islamic world. A center of the arts and learning, Baghdad was also a city of dazzling wealth and luxury. Harun al-Rashid himself was a big supporter of the arts and music, and these artistic pursuits flourished while he reigned as caliph.

The connotative definition of flourished is "were successful."

What is the context clue that tells you this?

Harun al-Rashid supported the arts and music, so it makes sense that these artistic pursuits would be successful while he was in charge. is the answer.