Which of the following sentences demonstrates the correct use of a hyphen?
The store is open from 9 a.m. - 5 p.m.
The store is open from 9 a.m to 5 p.m.
The store is open from 9:00 a.m. to 5:00 p.m.
The store is open from 9:00am to 5:00pm.

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