Elektron data platform data/news/ endpoint

The first question is that what's the difference between Attribution Code and Product Code? I didn't really understand what's the difference between creator, info source, audience of the returned json body after reading EDP News User Guide.

The second question is that in order for me to call API to get RIC or PermID from a company name, can I know what permissions do I need and how can I call them, or is there a csv file that contains the mapping?

The third question is that do we have any ways to match as many keywords as possible that I gave in automatically so that I don't need to call query=(A and B and C) or (A and B) or (A and C) or A or B or C.

Thanks.