The Key Issue with Connection Fees Received for Connecting a Customer

The key issue with connection fees received for connecting a customer to a telecommunications network is:

A) whether they were provided by the principal or an agent.
B) whether the provision of the handset is a separate transaction.
C) whether the distribution channels used by the telecommunications companies are acting as agents or acting in their own rights as principals.
D) whether the revenue is recognised in full upfront or over an actual or implied service period.