Within equities research, which of the following were still allowed for large investment banks after the 2003 research settlement with the state of New York and other parties?

a. Research analysts can speak with client coverage and equity capital markets bankers without a chaperone

b. Research analysts can participate internally at the bank in the process leading up to an underwritten IPO

c. Research analysts can agree to upgrade their rating on stock in return for the bank's CEO agreeing to help get the analyst's kids admitted to a fancy nursery school

d. Client coverage and equity capital markets bankers can heavily influence the annual bonus paid to a research analyst