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