Differentiate between ‘over’ and ‘until’ in the context of prepositions of time.

A. Over is used for future events, while until is used for past events.

B. Over refers to a specific point in time, whereas until refers to a completed period of time.

C. Over and until are interchangeable in the context of prepositions of time.

D. The preposition ‘over’ refers to a completed period of time, whereas ‘until’ refers to a specific point in time.