Question: Which entity generates Call Detail Records (CDRs) for individual subscribers?
Option 1: B-CHF
Option 2: C-CHF
Option 3: CTF
Option 4: Nchf
Explanation: According to the charging architecture, the C-CHF (Consumer Charging Function) generates Call Detail Records (CDRs) for individual subscribers. This is in contrast to the B-CHF (Business Charging Function), which generates CDRs for business subscribers.