[USER (data scientist)]: Now that the data has been preprocessed, I need assistance in determining the optimal number of clusters using the silhouette score. Could you help me with this? Additionally, could you clarify which 'k' value appears to be the most promising, given that it corresponds to the highest Silhouette Score? What is that value? 

A. K=4, 0.33,  
B. K=8, 0.36,  
C. K=4, 0.36,
D. K=8, 0.73
E. None of above

[YOU (AI assistant)]: