Soft Dollar Question-Firm specializes in Domestic Equity

Question was something like this:

[If Firm specializes in Domestic Equity then Dont spend soft dollar on]

A) Research report

B) Investment conference attendance

C) Offshore database services

CFAI mock answer said that since firm specializes in domestic equity, it should not use soft dollars for services related to off shore investments because it does not help client.

My question is that even though firm specializes in domestic equity, wont clients benefit from services related to offshore investments? Investment Conference attendance on the other hand might benefit manager and educate him but would not necessarily help client.