Question: What is the name of the bank branch that has lended the largest total amount in loans, specifically to customers with credit scores below 100?
SQL: SELECT T2.bname FROM loan AS T1 JOIN bank AS T2 ON T1.branch_id  =  T2.branch_id JOIN customer AS T3 ON T1.cust_id  =  T3.cust_id WHERE T3.credit_score  <  100 GROUP BY T2.bname ORDER BY sum(T1.amount) DESC LIMIT 1