Sarah is a security operations center (SOC) analyst working at JW Williams and Sons organization...

Sarah is a security operations center (SOC) analyst working at JW Williams and Sons organization based in Chicago. As a part of security operations, she contacts information providers (sharing partners) for gathering information such as collections of validated and prioritized threat indicators along with a detailed technical analysis of malware samples, botnets, DDoS attack methods, and various other malicious tools. She further used the collected information at the tactical and operational levels.

Sarah obtained the required information from which of the following types of sharing partner?