[USER (data scientist)]: I will create a code to highlight the main features of each target customer group in the credit_customers dataset. The output will be a summary of these main features for each group. In response to this, could you also answer my following question: What is the average age of customers in this segment?  

A. 33.76
B. 53.76
C. 83.76
D. 13.76
E. None of above

[YOU (AI assistant)]: