A. the existence of diverse political parties
B. the adoption of the policy of Assimilation
C. the tolerance of nationalist newspapers
D. unfair socio-political environment
Correct Answer: Option B
B. the adoption of the policy of Assimilation
Explanation
The adoption of the policy of Assimilation is the correct answer. This Policy was directly adopted in the French West African Colonies and it slowed down the pace of nationalism unlike in the British West African colonies.