Based on which two conditions can master Preventive Maintenance （PM） schedules be created？（）
- A elapsed time since the target start date or completion date of previous work generated by PM
- B difference between completion date of previous work and system date is equal to Lead Time
- C elapsed time since the target start date or completion date of the latest work orders for the asset
- D metered equipment usage since the target start date or completion date of previous work generated by PM
- E metered equipment usage since the target start date or completion date of the latest work order for the asset