Question

Which is the best way to write these two clauses as a complete sentence?
Susan walked the dog. The next-door neighbors were out of town.

Susan walked the dog as though the next-door neighbors were out of town.

Susan walked the dog rather than the next-door neighbors were out of town.

Susan walked the dog while the next-door neighbors were out of town.

Susan walked the dog after the next-door neighbors were out of town.

HELP PLEASE, 5 MEDALS?