What correctly describes the possible causes of price proration?

Which three initial measurement data (IMD) exception categories are available when you execute VEE rules?
(Choose three.)

Which three statements are true about initial measurements, final measurements, and usage? (Choose three.)

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 statements about usage subscription types are correct? (Choose two.)