[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. Since you have this information, could you tell me: What is the minimum number of years of employment for the majority of customers in this segment? 

A. 3 years
B. 1 years
C. 6 years
D. 7 years
E. None of above

[YOU (AI assistant)]: