Apparently someone actually read the instructions and it seems the RIC is correct choice. Page 15 of the instructions:

You don't need to report income
passed through from a mutual
fund or other regulated
investment company (RIC) on a
country-by-country basis. Total all
income, in the applicable category,
passed through from the mutual fund or
other RIC and enter the total in a single
column in Part I. Enter “RIC” on line i.
Total all foreign taxes passed through
and enter the total on a single line in
Part II for the applicable category.