Final answer:
Nene's persuasion attempt failed due to cultural differences that created a barrier for Nnaemeka, who was deeply rooted in his own cultural beliefs.
Step-by-step explanation:
Nene's attempt to persuade Nnaemeka was a failure primarily due to C) Cultural differences. The question is referencing a literary piece, and the answer suggests that the characters involved have contrasting cultural backgrounds which create a barrier to both understanding and acceptance. Nnaemeka is rooted in his own cultural beliefs and values, making it challenging for Nene to sway his opinions or decisions. It is not just a matter of empathy, communication, or personal choice, but rather a fundamental difference in cultural perspective that cannot be easily reconciled or overcome.