After Passage of the Gramm-Leach-Bliley Act of 1999, Robert Rubin

After passage of the Gramm-Leach-Bliley Act of 1999, Robert Rubin resigned as secretary of the Treasury Department and did what?

A) He chaired a subcommittee on Financial Institutions to craft further reforms in investment banking.
B) He became chief executive at Wachovia and oversaw its sale to Well Fargo as a result of the legislation.
C) He wrote a book called Why I Left Goldman Sachs , detailing how the legislation benefited investment banks.
D) He became an advisor to Citigroup, which had benefited from the legislation.