[USER (data scientist)]: I will create a code to outline 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. After this, could you please answer my question: How much older, on average, are the customers in this segment compared to those in the first segment? 

A. 12.13
B. 3.13
C. 9.13
D. 5.13
E. None of above

[YOU (AI assistant)]: