Concept:The Clifford Constitution of 1922 introduced the elective principle in Nigeria.
This principle made the formation of political parties possible.
Explanation:Before 1922, Nigerians had no elected representatives in the legislative council.
The Clifford Constitution allowed for the election of a few African members from Lagos and Calabar.
To contest these elective seats, organised political groups became necessary.
Consequently, the Nigerian National Democratic Party (NNDP) was founded in 1923.
Therefore, the elective principle under the Clifford Constitution laid the foundation for political parties.
Answer:A. The Clifford constitution of 1922.