The Western/English Historians/Thinkers/Travellers/British Educationists are acknowledged that during the rules of the Muslims in Subcontinent the education was common and________________?

A. Only for upper classes
B. Free
C. Expensive
D. Limited to poor

The correct answer to the question: "The Western/English Historians/Thinkers/Travellers/British Educationists are acknowledged that during the rules of the Muslims in Subcontinent the education was common and________________?" is "Free".