Would you please explain the meaning of "Both the CDS and the LOC seek to improve the buyer/holdercredit risk on company A by including an additional credit counterparty for a fee"?
I think its just a way of saying that, if you want your credit risk to company A improved, both LOC and CDSs will do the job for a fee. In both cases, a third party makes a guarantee of some sort for the fee, which improves your credit risk to Company A.