The correct answer is D because Workday allows multiple benefit events to be open at the same time only when they do not impact the same coverage types. Coverage types define categories of benefits such as medical, dental, or life insurance. When two events affect different coverage types, the system can process them independently without conflict, allowing both events to remain open simultaneously.

If two events impact the same coverage type, Workday typically enforces sequencing rules to prevent overlapping or conflicting elections. In such cases, one event must usually be completed or closed before another can proceed, ensuring data integrity and consistent benefit elections. Option A is incorrect because event dates alone do not determine whether events can coexist. Option B and C are also incorrect because the timing of when events are entered does not control simultaneous processing. The key determining factor is whether the events overlap in the coverage types they affect. When they do not share coverage types, Workday permits both events to remain open concurrently.