Concept:The constitution that placed strong emphasis on popular participation and national unity was introduced during the regime of Arthur Richards.
Explanation:Arthur Richards, as Governor of Nigeria, made it his chief objective to foster unity among the diverse groups in the country.
He also wanted Nigerians to take a more active part in managing their own affairs.
This idea formed the core purpose of the Constitution he introduced in 1946.
That constitution is therefore remembered as one that sought to create a more people-led and informed system of governance.
The Lyttleton, Clifford, and Macpherson constitutions each had different priorities, but it was Richards who first made this inquiry central to his regime.
Answer:C. Richard's