How many bill segment-related financial transactions do Payment Arrangements have?

Which option correctly describes the high-level process from loading measurements through calculating usage?

Your client has installed scalar devices to measure the solar energy generated (Export) and the energy received (Import) from the National Grid. This data is stored in separate measuring components (registers).
The validation rules are generally the same for both measuring components, but there is one exception. The Negative Consumption check applies only to energy received (import).
Which two are possible configurations resulting in the Negative Consumption rule being checked for energy received (import) only? (Choose two.)

Which two plug-in spots can call the rating functionality using base package-supplied algorithm types? (Choose two.)

What correctly describes the possible causes of price proration?