What is the minimum number of Hire/Movement/Termination conditions that can be created to fulfill these requirements?

Consider the following scenario: A customer has asked to determine their Hires, Terminations, and Movement Events using the following Event codes: H C Hire P C Promotion D C Demotion X C Transfer T C Termination. Promotions are only counted if there is an increase in the Salary Band and Demotions are only counted if there is a decrease in the Salary Band.

What is the minimum number of Hire/Movement/Termination conditions that can be created to fulfill these requirements?
A . 5: An Event List condition for Hires, Internal Movements, and Terminations. An Event List and an Increase in Value for Promotions. An Event List and a Decrease in Value for Demotions
B . 5: An Event List condition for Hires, Transfers, and Terminations. An Event List and an Increase in Value for Promotions. An Event List and a Decrease in Value for Demotions
C . 3: An Event List condition for Hires, Promotions, Demotions, Transfers, and Terminations. An Increase in Value for Promotions. A Decrease in Value for Demotions
D . 7: An Event List condition for each movement type. An Increase in Value for Promotions. A Decrease in Value for Demotions

Answer: A