Analyze the relationship between 'CommonBond' and 'student loan' within the context of the input sentence.
Options: operator, product/material produced, owner of, distributed by

Enter student loan refinancing companies, such as SoFi and CommonBond , which hope to lower your interest rate by re-financing and/or consolidating your loans, and aggregators such as Credible, which powers NerdWallet’s engine by providing users a simple search engine interface for finding such a re-financing provider.
product/material produced